Download Vaillant ecoTEC plus 618 Specifications

For the installer
Instructions for installation and servicing
ecoTEC
Wall hung room sealed fan assisted condensing boiler
ecoTEC plus 612
ecoTEC plus 615
ecoTEC plus 618
ecoTEC plus 624
ecoTEC plus 630
ecoTEC plus 637
ecoTEC plus 824
ecoTEC plus 831
ecoTEC plus 837
ecoTEC pro 28
GB
Contents
Contents
1
1.1
1.1.1
1.1.2
1.1.3
1.2
1.3
1.4
1.5
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . .
Notes on the documentation . . . . . . . . . . . . . . . .
Applicable documents . . . . . . . . . . . . . . . . . . . . . .
Retention of documents . . . . . . . . . . . . . . . . . . . .
Safety instructions and symbols . . . . . . . . . . . . .
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CE marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas council numbers . . . . . . . . . . . . . . . . . . . . . . .
4
4
4
4
4
4
4
5
5
2
2.1
2.2
2.4
2.5
Boiler specifications . . . . . . . . . . . . . . . . . . .
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Type plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
6
8
9
9
3
3.1
General requirements . . . . . . . . . . . . . . . . . .
Preliminary remarks for room sealed
appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related documents . . . . . . . . . . . . . . . . . . . . . . . .
Contents included with delivery . . . . . . . . . . . . .
Installation site . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flue pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard 100 mm flue system . . . . . . . . . . . . . . .
Optional 125 mm flue system . . . . . . . . . . . . . . . .
Flue termination . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical supply . . . . . . . . . . . . . . . . . . . . . . . . . . .
Guide to system requirements. . . . . . . . . . . . . . .
Water circulation system . . . . . . . . . . . . . . . . . . .
Filling and preparing heating system . . . . . . . . .
Pressure relief valve . . . . . . . . . . . . . . . . . . . . . . .
Pressure gauge. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expansion vessel . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump specifications . . . . . . . . . . . . . . . . . . . . . . .
Circulating pump . . . . . . . . . . . . . . . . . . . . . . . . . .
System by-pass . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condensate trap . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
Boiler installation sequence . . . . . . . . . . . . .
Required minimum distances/assembly
clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Select position for boiler . . . . . . . . . . . . . . . . . . .
Unpack the boiler . . . . . . . . . . . . . . . . . . . . . . . . . .
Using boiler template . . . . . . . . . . . . . . . . . . . . . .
Flue exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fitting the boiler hanging bracket . . . . . . . . . . .
Installing the flue system . . . . . . . . . . . . . . . . . . .
Fitting the boiler . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the front case . . . . . . . . . . . . . . . . . . .
General instructions for heating system . . . . . .
Gas connection . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cold water mains inlet and hot water outlet
(ecoTEC combination boilers only) . . . . . . . . . . .
16
3.2
3.3
3.4
3.5
3.6
3.6.1
3.6.2
3.7
3.8
3.9
3.10
3.10.1
3.10.2
3.10.3
3.10.4
3.10.5
3.11
3.11.1
3.11.2
3.11.3
3.12
4
4.1
4.1.1
4.1.2
4.1.3
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
2
10
10
10
12
13
13
13
13
14
14
15
15
15
15
15
15
15
16
16
16
16
16
16
17
17
17
18
18
18
18
18
18
19
4.10
4.11
4.11.1
4.11.2
4.12
4.13
4.13.1
4.13.2
4.13.3
4.14
4.14.1
4.14.2
4.14.3
Condensate drain pipe . . . . . . . . . . . . . . . . . . . . .
Heating connection . . . . . . . . . . . . . . . . . . . . . . .
Heating flow and return connection. . . . . . . . . .
Pressure Relief Valve. . . . . . . . . . . . . . . . . . . . . . .
Connecting the flue system to the boiler . . . . .
Electrical connection . . . . . . . . . . . . . . . . . . . . . . .
General requirements . . . . . . . . . . . . . . . . . . . . . .
Connection to the main supply . . . . . . . . . . . . . .
Electric board layout . . . . . . . . . . . . . . . . . . . . . . .
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vaillant controls and accessories . . . . . . . . . . . .
External electrical controls . . . . . . . . . . . . . . . . .
Connection details for external time switches
and boiler terminal strip . . . . . . . . . . . . . . . . . . . .
4.14.4 Vaillant optional plug in timer accessories . . . .
4.14.5 Connection details using the VR 65 Control
Center. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.15 Thermostatic radiator valves . . . . . . . . . . . . . . . .
4.16 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.17 Circulating pump . . . . . . . . . . . . . . . . . . . . . . . . . .
4.18 Anticycling ‘economiser’ control . . . . . . . . . . . . .
4.19 Automatic pump spin control (APS) . . . . . . . . . .
20
21
21
22
22
22
22
23
24
27
27
27
5
5.1
5.2
5.3
28
28
28
5.12
Commissioning Part I . . . . . . . . . . . . . . . . . .
Preliminary electrical checks . . . . . . . . . . . . . . . .
Gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cold water supply (ecoTEC combination
boilers only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling and bleeding the heating system . . . . . .
Checking the filling pressure of the heating
system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ecoTEC plus combination boiler filling loop . . .
Filling the heating system in ecoTEC pro
combination boilers and ecoTEC plus
system boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling the heating system for the first time . . .
Initial system flush (“cold”) . . . . . . . . . . . . . . . . .
Filling the condensate siphon . . . . . . . . . . . . . . .
Adjusting the pumping capacity . . . . . . . . . . . . .
Adjusting the by-pass . . . . . . . . . . . . . . . . . . . . . .
Checking the gas supply . . . . . . . . . . . . . . . . . . . .
Factory settings . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas inlet working pressure . . . . . . . . . . . . . . . . . .
Checking the gas rate . . . . . . . . . . . . . . . . . . . . . .
Refitting the case . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjusting the central heating output
(range rating) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas changeover . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
6.1
6.1.1
6.1.2
6.1.3
6.1.4
6.2
6.3
Functional checks (commissioning part II) .
Functional checks. . . . . . . . . . . . . . . . . . . . . . . . . .
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water heating (combination boilers only) . . . . .
Final flush of the heating system (“hot”) . . . . .
Handing over to the user . . . . . . . . . . . . . . . . . . .
Vaillant warranty . . . . . . . . . . . . . . . . . . . . . . . . . .
33
33
33
34
34
34
34
35
5.4
5.4.1
5.4.2
5.4.3
5.4.4
5.5
5.6
5.7
5.8
5.9
5.9.1
5.9.2
5.9.3
5.10
5.11
27
27
27
27
28
28
28
28
28
28
29
29
30
30
30
30
31
31
31
31
31
32
32
33
33
19
Instructions for installation and servicing ecoTEC
Contents
7
7.1
7.1.1
7.1.2
7.1.3
Inspection and maintenance . . . . . . . . . . . .
Initial inspection . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety instructions. . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview of the inspection and maintenance
tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1.4 Functional check of boiler operation . . . . . . . . .
7.2
Servicing the burner module . . . . . . . . . . . . . . . .
7.2.1 Removing the burner module . . . . . . . . . . . . . . .
7.2.2 Cleaning the integral condensation heat
exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2.3 Checking the burner . . . . . . . . . . . . . . . . . . . . . . .
7.2.4 Refitting the burner module . . . . . . . . . . . . . . . .
7.3
Cleaning the condensate siphon . . . . . . . . . . . . .
7.4
Checking the expansion vessel . . . . . . . . . . . . . .
7.5
Recommissioning the boiler . . . . . . . . . . . . . . . . .
7.6
Test operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
35
35
35
36
8
8.1
8.1.1
8.1.2
8.1.3
8.1.4
8.4
8.5
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . .
Logical fault finding procedure . . . . . . . . . . . . . .
Status codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic codes . . . . . . . . . . . . . . . . . . . . . . . . . .
Fault codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fault memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resetting parameter to factory settings . . . . . .
40
40
41
41
44
44
46
46
9
9.1
9.2
9.3
9.4
9.5
9.6
9.7
Parts replacement. . . . . . . . . . . . . . . . . . . . .
Safety instructions. . . . . . . . . . . . . . . . . . . . . . . . .
Replacing burner . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing fan or gas valve . . . . . . . . . . . . . . . . . .
Replacing expansion vessel . . . . . . . . . . . . . . . . .
Replacing primary heat exchanger . . . . . . . . . . .
Replacing electronics and display . . . . . . . . . . . .
Check CO2 content and if necessary set
(air-ratio adjustment) . . . . . . . . . . . . . . . . . . . . . .
46
46
46
47
47
48
49
36
36
37
37
37
38
38
39
40
40
40
49
10
10.1
10.2
Recycling and disposal . . . . . . . . . . . . . . . . . 50
Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
11
Vaillant service . . . . . . . . . . . . . . . . . . . . . . . 50
Appendix
EG declaration of conformity . . . . . . . . . . . . . . . . 49
Benchmark gas boiler commissioning
checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Instructions for installation and servicing ecoTEC
3
1 Introduction
1
Introduction
1.1
Notes on the documentation
The following information is intended to help you
throughout the entire documentation.
Further documents apply in combination with this installation and maintenance manual.
We assume no liability for any damage caused by
non-observance of these manuals.
1.1.1 Applicable documents
The following additional documents are provided with
the appliance:
For the owner of the system:
Brief users instructions
(only ecoTEC plus)
Warranty card with return envelope
no. 838404
no. 802922
For the qualified technician:
Instructions for installation and servicing no. 839592
Flue installation instructions
no. 835296
The manuals for any accessories and controllers used
also apply.
1.1.2 Retention of documents
Please pass on this installation manual to the owner of
the system. The owner should retain the manuals so that
they are available when required.
1.1.3 Safety instructions and symbols
Please observe the safety instructions in this manual for
the installation of the appliance!
Symbols used in the manual are explained below:
Danger!
Immediate danger to life and limb!
Caution!
Potentially dangerous situation for the product
and environment!
Note
Useful information and instructions.
• Symbol for a necessary task
- List for function descriptions or general list
1.2
Introduction
Note
This boiler must be installed and serviced by a
competent person in accordance with the Gas
Safety (Installation and Use) Regulations 1998.
In the UK ‘CORGI’ registered installers undertake the work in compliance with safe and satisfactory standard.
4
ecoTEC combination boiler
The ecoTEC combination boiler is a fully automatic, wall
mounted, room sealed condensing (high efficiency) boiler for central heating and domestic hot water.
Domestic hot water is supplied directly from the boiler,
without requiring a copper cylinder, cold water tank,
feed and expansion vessel and associated pipework.
Domestic hot water has priority over central heating.
The ecoTEC plus combination boiler consists of 3 models
with outputs of 23 kW, 31 kW and 37 kW for domestic hot
water and a pro version with an output of 28 kW for
domestic hot water.
All versions are available in natural gas. The ecoTEC plus
831 is also available in LPG.
ecoTEC combination boilers incorporate a warm start
facility that keeps the domestic hot water heat exchanger hot, providing an instantaneous delivery of domestic
hot water. The temperature in the domestic hot water
heat exchanger is limited by the boiler control system
and it is not necessary to install a scale reducer on the
cold mains to the boiler. However, in areas that get
exceptionally hard water, a scale reducer may be fitted
to prevent scale formation in the hot water system
pipes. The heating system on ecoTEC plus combination
boilers can be filled using the built–in filling loop contained within the boiler.
ecoTEC system boiler
The ecoTEC system boiler is a fully automatic, wall
mounted, room sealed condensing (high efficiency) boiler for central heating and domestic hot water (where a
separate indirect hot water storage cylinder is also
incorporated in the system). The ecoTEC system boiler
consists of models with outputs of 12, 15, 18, 24, 30 and
37 kW. All ecoTEC system boilers are available in Natural
Gas. The ecoTEC plus 618 and 630 are also available in
LPG.
1.3
General Notes
The boilers have been designed for use with a sealed
central heating system, and come fully tested and
assembled with a built in circulating pump, expansion
vessel and diverter valve (ecoTEC combination boilers).
The boilers are easily mounted on any internal wall and
can be installed with either a horizontal or vertical RSF
(room sealed fan assisted) flue.
The boilers use a standard flue system (100 mm or
125 mm outside diameter). Flue extensions and additional bends and elbows are available for the flue system to
increase the flexibility. If desired, an inhibitor may be
used in the system. Guidance on the use of inhibitors is
contained in these instructions.
All boilers have a built in diagnostic system which indicates the operational status of the boiler. This feature
provides key information to aid commissioning and fault
finding. The data badge is fitted to the underside of the
boiler. See text of General Requirements for installation
requirements or notes.
Instructions for installation and servicing ecoTEC
Introduction 1
The Valliant ecoTEC are state-of-the-art appliances
which have been constructed in accordance with recognised safety regulations. Nevertheless, danger to the life
and limb of the user or third parties can still occur or
the appliance or other material assets be damaged in
the event of improper use.
The appliance is designed to generate heat for connecting to hot water central heating systems and for instantaneous hot water supply (ecoTEC combination boilers
only). Any other use or extended use is considered to be
use other than intended. The manufacturer/supplier is
not liable for any resulting damage.
Intended use includes the observance of the operating
and installation manual and the adherence to the inspection and maintenance conditions.
Danger!
Any incorrect use is forbidden.
1.5
Gas council numbers
Applaince
Gas council numbers
ecoTEC pro 28
47-044-30
ecoTEC plus 824
47-044-31
ecoTEC plus 831
47-044-32
ecoTEC plus 831 Propane
47-044-34
ecoTEC plus 837
47-044-35
ecoTEC plus 612
41-044-44
ecoTEC plus 615
41-044-45
ecoTEC plus 618
41-044-46
ecoTEC plus 618 Propane
41-044-51
ecoTEC plus 624
41-044-47
ecoTEC plus 630
41-044-48
ecoTEC plus 630 Propane
41-044-50
ecoTEC plus 637
41-044-52
Table 1.1 Gas council numbers
The appliances must be installed by a competent person,
who is responsible for adhering to the existing regulations, rules and guidelines.
1.4
CE marking
The CE marking shows that the appliances comply
with the basic requirements of the following directives:
- Gas appliances directive (90/396/EEC)
- Electromagnetic compatibility directive with threshold
class B (89/336/EEC)
- Low voltage directive (73/23/EEC)
The appliances satisfy the basic requirements of the efficiency directive (92/42/EEC) as condensing appliance.
- The Gas Applaince (Safety) Regulations 1992
- The boiler (Efficiency) Regulations 1993
Vaillant Ltd. supports the Benchmark initiative.
At the rear of this guide, you will find a
Benchmark gas boiler commissioning checklist.
It is very important that this is completed correctly at the time of installation, commissioning and hand over to the user.
Instructions for installation and servicing ecoTEC
5
2 Boiler specifications
2
Boiler specifications
2.1
Technical data
Technical data
CH heat output range
80 °C flow/60 °C return
60 °C flow/40 °C return
50 °C flow/30 °C return
40 °C flow/30 °C return
Maximum DHW output
824
ecoTEC plus
831
837
ecoTEC pro
28
6.7 – 19.0
6.9 – 19.6
7.1 – 20.2
7.2 – 20.6
8.7 – 24.0
9.0 – 24.7
9.2 – 25.5
9.4 – 26.0
12.0 – 28.0
12.3 – 28.9
12.7 – 29.7
12.9 – 30.3
9.0 – 24.0
9.3 – 24.7
9.6 – 25.5
9.8 – 26.0
kW
kW
kW
kW
kW
Units
23.0
31.0
37
28.0
Maximum output for heating
19
24
28
24
kW
Minimum output
6.7
8.7
12
9.0
kW
A
A
A
A
Category
SEDBUK Band
II2H3P
Band
SAP Seasonal Efficiency
91.1
%
Inlet gas working pressure required (G20, natural gas)
20
mbar
Inlet gas working pressure required (G31, Propane)
Connected load (if needed, related to stored charge/
water heating) at 15 °C and 1013 mbar
Exhaust mass rate
at minimum thermal load (40 °C flow/30 °C return)
at maximum thermal load (80 °C flow/60 °C return)
Exhaust temperature
at minimum thermal load (40 °C flow/30 °C return)
at maximum thermal load (80 °C flow/60 °C return)
NOx class
37
G20: 4.0
G31: 2.94
G20: 3.0
G31: 2.22
3.2
10.7
4.2
14.4
5.7
17.1
4.4
13.0
g/s
g/s
40
74
40
83
40
70
40
74
°C
°C
5
IP X4D
max. flow temperature
Adjustable flow temperature
Default setting: max. 75 °C
Maximum CH system pressure
85
°C
30 – 85
40 – 85
30 – 85
°C
3.0
bar
817
1032
1204
1032
l/h
1.8
2.2
2.9
2.2
l/h
250
Minimum DHW flow rate
mbar
1.5
DHW flow rate ΔT=35 K rise
9.4
12.7
Appr. DHW flow rate at factory set temp. rise (ΔT=42 K)
7.9
10.6
Permitted DHW overpressure
Mains water pressure required for max. flow rate
m3/h
kg/h
G20: 3.3
G31: 2.46
Protection class
Circulation water volume (ΔT=20 K)
Approx. condensation volume
at 50 °C flow/30 °C return heating
Pump delivery height
mbar
G20: 2.5
G31: 1.82
l/min
15.2
11.5
l/min
12.6
9.6
l/min
0.75
0.5
10
0.5
bar
0.75
Mains water pressure required for min. flow rate
0.15
bar
bar
Hot water discharge temperature range
35 – 65
°C
Exhaust flue
60/100
mm
Flue categories
C13, C33, C43, C53, C83, B23, B33
10 l expansion vessel pre-charge pressure
Connections heating flow/return
Gas inlet
0.75
bar
22
mm
15
22
15
mm
Pressure relief discharge pipework (min.)
15
mm
Condensate drain (min. internal drain)
19
mm
Dimensions (H x W x D)
720 x 440 x 335 720 x 440 x 335 720 x 440 x 403 720 x 440 x 335 mm
Weight (boiler only)
35
38
43
37
kg
Primary water content
1.9
2.3
2.5
2.1
l
Electrical supply voltage
230/50
Internal fuse (slow) main voltage
Power input
V ~/Hz
2
110
125
A
140
115
W
Table 2.1 Technical data ecoTEC combination boiler
6
Instructions for installation and servicing ecoTEC
Boiler specifications 2
ecoTEC plus
Technical data
CH heat output range
80 °C flow/60 °C return
60 °C flow/40 °C return
50 °C flow/30 °C return
40 °C flow/30 °C return
Category
SEDBUK Band
SAP Seasonal Efficiency
Inlet gas working pressure required (G20,
natural gas)
Inlet gas working pressure required (G31,
Propane)
Connected load (if needed, related to stored
charge/water heating) at 15 °C and 1013 mbar
Exhaust mass rate
at minimum thermal load (40 °C flow/30 °C
return
at maximum thermal load (80 °C flow/60 °C
return)
Exhaust temperature
at minimum thermal load (40 °C flow/30 °C
return)
at maximum thermal load (80 °C flow/60 °C
return)
NOx class
612
615
618
4.9 – 12.0
5.1 – 12.3
5.2 – 12.7
5.3 – 12.9
4.9 – 15.0
5.1 – 15.5
5.2 – 15.9
5.3 – 16.2
A
A
6.7 – 18.0
8.7 – 24.0
6.9 – 18.6
9.0 – 24.7
7.1 – 19.1
9.2 – 25.5
7.2 – 19.5
9.4 – 26.0
II2H3P
A
630
637
10.0 – 30.0
10.3 – 30.9
10.6 –31.8
10.8 – 32.4
12.0 – 37.0
12.3 – 38.2
12.7 – 39.3
12.9 – 40.1
A
A
A
Units
kW
kW
kW
kW
Band
91.2
%
20
mbar
37
mbar
m3/h
kg/h
G20: 1.3
G31: 0.95
G20: 1.6
G31: 1.19
G20: 1.9
G31: 1.43
G20: 2.6
G31: 1.90
G20: 3.2
G31: 2.38
G20: 4.0
G31: 2.94
2.3
2.3
3.2
4.2
4.8
5.7
g/s
5.6
7.0
8.3
11.2
13.9
17.1
g/s
40
40
40
40
°C
70
75
83
70
°C
5
Protection class
IP X4D
max. flow temperature
Adjustable flow temperature
Default setting: max. 75 °C
Maximum CH system pressure
Circulating water volume (ΔT=20 K)
Approx. condensation volume
at 50 °C flow/30 °C return heating
Pump delivery height
Adjustable storage target value (15 °C at left
stop, spare adjusting range 40 – 70 °C
Exhaust flue
624
85
°C
30 – 85
°C
3.0
bar
516
645
774
1032
1290
1591
l/h
1.1
1.4
1.7
2.2
2.7
3.8
l/h
250
Flue categories
mbar
15 – 70
°C
60/100
mm
C13, C33, C43, C53, C83, B23, B33
10 l expansion vessel pre-charge pressure
Connections heating flow/return
Gas inlet
0.75
bar
22
mm
15
22
mm
Pressure relief discharge pipework (min.)
15
mm
Condensate drain (min. internal drain)
19
mm
Dimensions (H x W x D)
720 x 440 x 335
Weight (boiler only)
35
35
35
Primary water content
1.9
1.9
1.9
Electrical supply voltage
2.1
2.3
2.5
230/50
Internal fuse (slow) main voltage
Power input
37
720 x 440 x 720 x 440 x
mm
369
403
38
40
kg
V ~/Hz
2
100
110
100
l
A
110
110
140
W
Table 2.2 Technical data ecoTEC system boiler
Instructions for installation and servicing ecoTEC
7
2 Boiler specifications
2.2
Dimensions
9
65
8
190
440
175
241
7
6
642
720
883
125
10
11
12
20
5
4
3
2
1
35
100
45
300
75
130
180
ecoTEC plus 630:
334
ecoTEC plus 637,
ecoTEC plus 837:
368
35
100
5
4
3
2
1
Fig. 2.1 Dimensions in mm
Legend:
1 Heating return pipe Ø 22 mm
2 Cold water connection Ø 15 mm (combination boilers only)
3 Gas connection Ø 15 mm
4 Hot water connection Ø 15 mm (combination boilers only)
5 Heating flow pipe Ø 22 mm
6 Hanging bracket
7 Flue hole - flue system 60/100
8 Flue hole - flue system 80/125
9 Spacer frame accessory (Art. No.: 308 650)
10 Flue pipe connection
11 Condensate drain connection (Ø 19 mm)
12 Heating system expansion relief valve connection (Ø 15 mm)
Note
With the spacer frame (Art. No 308 650), the
pipes can be run behind the boiler. The distance
of the appliance from the wall thus increases by
65 mm.
8
Instructions for installation and servicing ecoTEC
Boiler specifications 2
2.4
Installation
14
14
1
13
1
2
2
3
13
4
3
4
5
5
12
6
12
11
10
10
7
8
9
Fig. 2.2 Function elements of combination boilers
Legend:
1 Expansion vessel
2 Air intake pipe
3 Burner module
4 Ignition electrode
5 Fan
6 Diverter valve with by-pass
7 Pump
8 Aqua-Sensor
9 Electronics box
10 Pressure sensor
11 Hot water heat exchanger
12 Gas valve
13 Heat exchanger
14 Flue pipe connection
7
9
Fig. 2.3 Function elements of system boilers
Legend:
1 Expansion vessel
2 Air intake pipe
3 Burner module
4 Ignition electrode
5 Fan
7 Pump
9 Electronics box
10 Pressure sensor
12 Gas valve
13 Heat exchanger
14 Flue pipe connection
2.5 Type plate
The type plate of the Valliant ecoTEC is attached to the
bottom of the appliance at the factory.
Instructions for installation and servicing ecoTEC
9
3 General requirements
3
General requirements
3.1
Preliminary remarks for room sealed appliances
This appliance should only be installed in conjunction
with either a Vaillant flue system or an alternative
approved system (details of flue approval categories can
be found in the technical section of the installation manual).
Install the flue system as detailed in the separate flue
installation instructions supplied with this boiler.
3.2 Related documents
The installation of the boiler must be in accordance with
the relevant requirements of Gas Safety (Installation and
Use) Regulations 1998, Health and Safety Document No.
635 (The Electricity at Work Regulations 1989), BS7671
(IEE Wiring Regulations) and the Water Supply (Water
Fitting) Regulations 1999, or The Water Bylaws 2000
(Scotland). It should also be in accordance with the relevant requirements of the Local Authority, Building
Regulations, The Building Regulations (Scotland), The
Building Regulations (Northern Ireland) and the relevant
recommendations of the following British Standards:
BS 6700: Services supplying water for domestic use
within buildings and their curtilages.
BS 6798: Specification for installation of gas fired boilers not exceeding 60 kW input.
BS 6891: Specification for installation of low pressure
gas pipework up to 28 mm (R1) in domestic premises
(2nd family gas).
BS 7593: Treatment of water in domestic hot water central heating systems. Institute of Gas Engineers Publication IGE/UP/7/1998: ”Guide for gas installations in timber framed housing”
BS. 5482: Pt. 1 Domestic butane and propane gas burning installations.
IGE/UP1: Soundness testing and purging of industrial and
commercial gas installation.
IGE/UP2: Gas installation pipework, boosters and compressors on industrial and commercial premises.
IGE/UP10. Installation of gas appliances in industrial and
commercial premises.
BS. 6644: Installation of gas fired hot water boilers of
rated inputs between 60 kW and 2 MW (2nd and 3rd family gases).
BS. 5449: Forced circulation hot water central heating
systems for domestic premises. Note: only up to 45 kW.
BS. 6880: Low temperature hot water heating systems
of output greater than 45 kW.
Part 1 Fundamental and design considerations.
Part 2 Selection of equipment.
Part 3 Installation, commissioning and maintenance.
BS. 4814: Specification for: Expansion vessels using an
internal diaphragm, for sealed hot water heating systems.
10
BS. 5440: Installation and maintenance of flues and ventilation for gas appliances of rated input not exceeding
70 kW net (1st, 2nd and 3rd family gases).
Part 1 Specification for installation of flues.
Part 2 Specification for installation and maintenance
of ventilation for gas appliances.
European installation directive
Important:
The appliance must be installed and serviced by
a competent person as stated in the Gas Safety
(Installation and Use) Regulations 1998. In IE,
the installation must be in accordance with the
current edition of I.S.813 ‘Domestic Gas
Installations’, the current Building Regulations
and reference should be made to the current
ETCI rules for electrical installation.
Important:
When tightening or slackening screwed connections always use suitable open-ended spanners
(not pipe wrench, or extensions, etc.).
Incorrect use and/or unsuitable tools can lead
to damage being caused (e.g. gas or water leakage)!
3.3 Contents included with delivery
The Vaillant ecoTEC is delivered pre-mounted in a package unit. Check that all the parts have been delivered
intact (see fig. 3.1 and table 3.1, fig. 3.2 and table 3.2 and
fig. 3.3 and table 3.3).
Instructions for installation and servicing ecoTEC
General requirements 3
1
8
1
8
2
7
2
7
3
6
4
5
3
6
4
5
Fig. 3.1 Contents included with delivery of ecoTEC plus system
boilers
Fig. 3.2 Contents included with delivery of ecoTEC plus combination boilers
DO NOT remove the boiler from the polystyrene base at
this stage.
DO NOT remove the boiler from the polystyrene base at
this stage.
Item
1
2
Quantity Description
1
1
Item
Quantity Description
Hanging bracket
1
1
Boiler
2
1
Boiler
1
Bottom cover
Connecting pipes (gas, heating, water, safety
valve)
Isolating valves and filling loop
Template
User, installation and service and flue installation manuals
Installation and connection accessories
For LPG appliances, extra: 1 sticker each for
tank and ventilation (above Fig.)
3
1
Bottom cover
3
4
4
Connecting pipes (gas, heating, safety valve)
4
6
5
3
Isolating valves
6
1
5
6
4
1
7
3
7
3
8
2
Template
User, installation and service and flue installation manuals
Installation and connection accessories
8
2
2
For LPG appliances, extra: 1 sticker each for
tank and ventilation (above Fig.)
Table 3.1 Contents included with delivery of ecoTEC plus system
boilers
Instructions for installation and servicing ecoTEC
2
Hanging bracket
Table 3.2 Contents included with delivery of ecoTEC plus combination boilers
11
3 General requirements
1
7
2
6
i
F
3.4 Installation site
The location chosen for the boiler must permit the provision of a satisfactory flue termination. The location must
also provide adequate space for servicing and air circulation around the boiler. The boiler may be installed in
any room, although particular attention is drawn to the
requirements of BS 7671 (IEE Regulations), the electrical
provisions of the Building Standards (Scotland)
Regulations, and in IE the current edition of IS 813 and
the current ETCI rules, in respect of the installation of a
boiler in a room containing a bath or shower.
P
bar
5
3
4
Fig. 3.3 Contents included with delivery of ecoTEC pro combination boilers
DO NOT remove the boiler from the polystyrene base at
this stage.
Item
Quantity Description
1
1
Hanging bracket
2
1
3
2
4
4
Boiler
Connecting pipes (hot water, heating safety
valve)
Isolating valves
5
1
7
1
8
2
Template
User, installation and service and flue installation manuals
Installation and connection accessories
Table 3.3 Contents included with delivery of ecoTEC pro combination boilers
12
Note
If a room sealed boiler is installed in a room
with a bath or shower, electrical switches or
boiler controls using the mains power supply
must be placed at locations that cannot be
reached by the person in the bath or shower.
If the boiler is installed in an unusual location, special
procedures may be necessary and BS 5546 and BS 6798
give detailed guidance on this aspect. The boiler must be
mounted on a flat, vertical wall, which must be sufficiently robust to take the weight of the boiler. The boiler
may be installed on a combustible wall, subject to the
requirements of the Local Authorities and Building
Regulations.
A compartment used to enclose the boiler must be
designed and constructed specifically for this purpose.
(An existing cupboard or compartment may be used provided that it is modified for the purpose). Details of
essential features of cupboard/compartment design
including airing cupboard installations are given in BS
6798. If the boiler is to be fitted in a timber framed
building, it should be fitted in accordance with Institute
of Gas Engineers Publication IGE/UP/7/1998 “Guide for
Gas Installation in Timber Framed Housing”.
Please note the safety instructions below before deciding where to install the boiler:
Caution!
Do not install the appliance in rooms prone to
frost. In rooms with aggressive steam or dust,
the appliance must be operated independent of
the ambient air.
When choosing the place of installation and while operating the appliance, make sure that the air supply is free
of chemical substances containing fluorine, chlorine, sulphur etc. Sprays, solvents and cleaning agents, paints,
adhesives etc. contain the kind of substances that can
lead to corrosion even in the exhaust system when the
appliance is operated depending on the ambient air in
the worst case scenario. Particularly in hair-cutting
salons, lacquering and finishing, cleaning facilities, the
appliance must be operated independent of the ambient
air! Otherwise, a separate installation room is required
to guarantee that the air supply is free of the above
mentioned substances.
Instructions for installation and servicing ecoTEC
General requirements 3
10
Flue pipe
Danger!
Vaillant appliances are certified only for use
with genuine Vaillant flue pipes. Only use genuine Vaillant flue pipes. Malfunctions can occur if
you use other accessories. These may result in
damage and injury. You will find a list of genuine
flue pipes in the Vaillant installation manual for
flue pipes.
The CE mark is valid only if the appliance is
operated with Vaillant flue pipes.
40
1435
880
3.6
550
3.5 Gas supply
The gas supplier should ensure the availability of an
adequate supply of gas. A gas meter may only be connected to the service pipe by the supplier of gas or their
contractor. An existing meter should be checked to
ensure that it is capable of passing the rate of gas supply required.
Installation pipes should be fitted in accordance with
BS 6891. In IE the current edition of IS 813. Pipework
from the meter to the boiler must be of an adequate
size. Do not use pipes of a smaller size than the boiler
gas connection (15 mm). The complete installation must
be checked for leaks and purged as described in
BS 6891.
Fig. 3.5 Art. No. 303 900
3.6.2 Optional 125 mm flue system
A concentric flue system of 125 mm outside diameter is
available and can be used to achieve flue lengths up to
25 m.
A vertical flue system is also available. Refer to flue system installation instructions for full details.
3.6.1 Standard 100 mm flue system
1103
87
65
74
754
48
15
30
70
70
Fig. 3.4 Art. No. 303 933
Fig. 3.6 Art. No. 303 209
70
880
1530
650
A standard 100 mm flue system (Art. No. 303 933) is
available. Refer to flue system installation instructions
for full details.
Flue extensions are available to extend this length up to
8 m. Both 90° bends and 45° elbows are also available
to increase siting flexibility.
Fig. 3.7 Art. No. 303 200
Instructions for installation and servicing ecoTEC
13
3 General requirements
3.7
Flue termination
The following details refer to both flue systems.
a. The terminal must be located where the combustible
substances can escape freely at all times.
b. A plume of water vapour will sometimes be visible
from the flue terminal. Positions where this could be
a nuisance should be avoided.
c. If the terminal is fitted less than 2 m above a balcony,
above ground or above a flat roof to which people
have access then a suitable terminal guard must be
provided and fitted (made by Tower Flue
Components, Tonbridge, TN9 1TB, Model K3, plastic
coated).
A
G
H,
I
F
B F
G
BCD
J
A
A
E
F
F
M
L
K
LK
A
G
Note
In addition, the terminal should not be nearer
than 150 mm to an opening in the building fabric formed for the purpose of accommodating a
built-in element such as a window.
BS 5440–1: It is recommended that the fanned flue terminal should be positioned as follows:
a) at least 2 m from an opening in the building directly
opposite, and
b) so that the products of combustion are not directed
to discharge across a boundary.
1) Dimensions B, C and D:
These clearances may be reduced to 25 mm without
affecting the performance of the boiler. In order to
ensure that the condensate plume does not affect
adjacent surfaces the terminal should be extended as
shown in Fig. 3.9.
2) Dimension F:
This clearance may be reduced to 25 mm without
affecting the performance of the boiler. However, in
order to ensure that the condensate plume does not
affect adjacent surfaces a clearance of 300 mm is
preferred. For IE, recommendations are given in the
current edition of IS 813.
Fig. 3.8 Flue termination
Note
Vertical flues must not terminate within
600 mm of an openable window, air vent or any
other ventilation opening.
The flue assembly shall be so placed or shielded as to
prevent ignition or damage to any part of the building.
Terminal position
mm
A
Directly below an opening, above an opening or hori300
zontal to an opening, air brick, opening window, etc.
B
Below gutters, soil pipes or drain pipes
75
C
Below eaves
200
D
Below balconies
200
E
From vertical drain pipes and soil pipes
25
F
From internal or external corners
300
G
Above ground, roof or balcony
300
H
From a surface facing a terminal
600
I
From a terminal facing a terminal
1200
J
From an opening (e.g. door, window) into the dwelling 1200
K
Vertically from a terminal on the same wall
1500
L
Horizontally from a terminal on the same wall
300
M
Distance from adjacent for vertical Flue
500
Table 3.4 Terminal position for a fan assisted concentric flue
14
Fig. 3.9 Flue termination under balcony/eaves
3.8 Air supply
Detailed recommendations for air supply are given in
BS 5440: Part 2.
It is not necessary to have an air vent in the room or
internal space in which the boiler is installed.
Cupboard or compartment ventilation
The boilers are very high efficiency appliances. As a consequence the heat loss from the appliance casing during
operation is very low. For cupboard or compartment
installations it is therefore not necessary to provide any
high or low level permanent air vents for cooling purposes.
Instructions for installation and servicing ecoTEC
General requirements 3
3.9 Electrical supply
A 230 V, ~ 50 Hz single phase electricity supply fused to
3 Amp. must be provided in accordance with the latest
edition of BS 7671 (IEE Wiring Regulations) and any other
local regulations that may apply. In IE reference should
be made to the current edition of the ETCI rules. The
method of connection to the mains electricity supply
must provide a means of completely isolating the boiler
and its ancillary controls. Isolation is preferably by the
use of a fused three pin plug and unswitched shuttered
socket outlet, both complying with the requirements of
BS 1363. Alternatively, a 3 Amp. fused double pole switch
with a 3 mm contact separation on both poles may be
used.
Danger!
This appliance must be earthed.
3.10
3.10.2 Filling and preparing heating system
The system can be filled using the built in filling loop
(ecoTEC plus combination boilers only) or via a separate
filling point fitted at a convenient position on the heating circuit. The connection must be removed when filling
is completed. Where local Water Authority regulation
does not allow temporary connection, a sealed system
filler pump with break tank must be used. The heating
system will not be filled automatically from the domestic
hot water side. (Alternative methods of filling sealed systems are given in BS 5449).
3.10.3 Pressure relief valve
A pressure relief valve is provided with the boiler. This
safety device is required on all sealed C.H. systems and
is preset at 3 bar and provided with a 15 mm compression connection for a discharge pipe, which must be of
no less than 15 mm in diameter. The pressure relief valve
must not be used for draining purposes.
Guide to system requirements
3.10.1 Water circulation system
Detailed recommendations for the water circulation system are given in BS 6798 and BS 5449: Part 1 (for small
bore and micro bore central heating systems). Pipework
not forming part of the useful heating surface should be
insulated to help prevent heat loss and possible freezing,
particularly where pipes are run through roof spaces
and ventilated underfloor spaces. Draining taps must be
located in accessible positions which permit the draining
of the whole system including the boiler and the hot
water system. Draining taps should be at least 1/2 in.
BSP nominal size and be in accordance with BS 2879.
The boiler is suitable for use with minibore or microbore
systems. Copper tubing to BS 2871: Part 1 should be used
for water carrying pipework. All capillary joints in all
DHW pipework must be made with lead free solder.
Particularly where a new boiler is to be fitted to an existing system, it is good practice that the system is thoroughly cleansed.
3.10.4 Pressure gauge
This is factory fitted to the boiler and indicates the primary circuit pressure to facilitate filling and testing.
3.10.5 Expansion vessel
ecoTEC boilers incorporate a 10 litre expansion vessel
which is suitable for a sealed heating system with a maximum water content of 100 litres.
If the nominal capacity of the built in expansion vessel is
not sufficient for the heating system (for instance in
case of modernisation of old open systems) an additional expansion vessel can be installed external to the boiler. It should be fitted in the return pipe as close as possible to the boiler in accordance with BS 5449: Part 1.
Guidance on the sizing of an additional expansion vessel
is given in Table 3.5.
Important:
To prevent the formation of deposits and prevent serious damage to the appliance and system, cleansers must be used carefully and must
be completely removed by thoroughly flushing
the system. Cleansers should only be left in
systems for a maximum of 24 hours.
This cleansing must take place prior to the fitting of the
new boiler and be in accordance with BS 7593. For
advice on the application of system cleansers contact
Sentinel, Betz Dearborn Ltd. Widnes, Cheshire, WA8
8UD. Tel: 0151 420 9595, or Fernox, Alpha Fry
Technologies, Tandem House, Marlow Way, Croydon, CR0
4XS. Tel 0870 8700362.
Instructions for installation and servicing ecoTEC
15
Vessel Volume [L]
Initial system pressure (bar)
1.0
Pressure relief valve setting (bar)
1.5
3.0
Total water content of system litres
25
50
100
125
150
175
200
225
250
275
300
325
350
375
400
425
450
475
500
For system volumes other than those given
above, multiply the system volume by the
factor across
2.7
5.4
10.9
13.6
16.3
19.1
21.8
24.5
27.2
30.0
32.7
35.7
38.1
40.9
43.6
46.3
49.0
51.8
54.5
3.9
7.8
15.6
19.5
23.4
27.3
31.2
35.1
39.0
42.9
46.8
50.7
54.6
58.5
62.4
66.3
70.2
74.1
78.0
0.109
0.156
400
300
200
100
0
0
200
400
600
800
1000
1200 1400 1600 1800
Volumeflow [l/h]
Fig. 3.11 Pump specifications ecoTEC pro
3.11.2 System by-pass
An automatic system by-pass is provided in the boiler.
The boiler is suitable for use in systems with thermostatic radiator valves and no additional by-pass is required.
The by-pass valve is adjustable, see section 5.8.
3.11.3 Venting
The boiler is fitted with an automatic air vent. Additional
provision should be made to enable the heating system
to be vented during filling and commissioning either by
automatic air vents or manually.
3.12 Condensate trap
The boiler is fitted with a siphonic condensate discharge
(ecoTEC plus) or a condensate trap (ecoTEC pro) incorporating a water trap of 140 mm.
Table 3.5 Sizing of additional expansion vessel
3.11
Lift [mbar]
3 General requirements
4 Boiler installation sequence
Pump specifications
3.11.1 Circulating pump
Boiler installation sequence
4.1
Required minimum distances/assembly clearances
min
4
400
min 5
300
165/246*
Lift [mbar]
only ecoTEC plus:
The circulating pump is included in the boiler. The residual pump discharge height depending on the by-pass
valve is shown in Fig. 3.10.
The operating mode of the 2-step pump can be adjusted
below the diagnosis number “d.19”, see section 8.1.2.
min 5
min 500**
200
1. Step
100
2. Step
0
200
400
600
800
1000
1200 1400 1600 1800
Volumeflow [l/h]
Fig. 3.10 Pump specifications ecoTEC plus
min 180
0
Fig. 4.1 Distances during installation (dimensions in mm)
only ecoTEC pro:
The circulating pump is included in the boiler. The ecoTEC pro appliances are fitted with a single-stage pump.
The residual pump discharge height depending on the
by-pass valve is shown in Fig. 3.11.
16
The boiler should be mounted on a flat and vertical area
of wall of sufficient area for the boiler plus the required
clearances for installation and servicing (fig. 4.1). These
are shown on the installation template supplied with the
boiler and are:
Instructions for installation and servicing ecoTEC
Boiler installation sequence 4
20
– 5 mm either side of the boiler
– 180 mm below the boiler
– 165 mm* above the boiler when utilising the 100 mm
outside diameter flue
– 246 mm* above the boiler when utilising the 125 mm
outside diameter flue
– 500 mm in front of the boiler to enable easy access
for servicing (may be provided by an opening door)
165
175
60/100
5
25
A
A
A
1065
4.1.1 Select position for boiler
Refer to section 3.4 ‘Installation site’ for information
regarding the appliance location. In general the boiler
must be positioned such that:
• There is adequate space around the boiler for service
and maintenance
• The boiler can be correctly flued, i.e. the flue terminal
position is located in accordance with these instructions and the air/flue duct can be installed in accordance with the flue installation instructions supplied.
• All necessary pipework can be connected, including
the pressure relief valve and condensate drain.
95
5
Note
If the boiler is to be fitted in a timber framed
building, it should be fitted in accordance with
British Gas publication DM2 ‘Guide for gas
installations in timber framed housing’.
4.1.2 Unpack the boiler
To unpack the boiler, cut both plastic carton straps, open
box and lift out the polystyrene top packing. Lift the
cardboard box upwards.
Note
Care should be taken not to scratch the white
surface of the boiler casing
01 2005
45°
256723_01
The template shows:
– The position of the fixing holes for the boiler mounting
bracket.
– The position of the connections.
– The position of the flue exit hole.
• Mark the position of the hanging bracket fixing holes.
• Drill 2 holes Ø 8 mm for the hanging bracket.
Note
Use alternative fixing holes where necessary.
Instructions for installation and servicing ecoTEC
A
A
180
4.1.3 Using boiler template
• Fix the paper template to the wall ensure that the
template is vertical.
450
Fig. 4.2 Assembly template
17
4 Boiler installation sequence
4.2 Flue exit
• If using rear flue mark the position of the air/flue duct
and its circumference.
Note
Lift the boiler from either side at the bottom
edge
Other flue options
Flue instructions for other flue systems such as vertical
RSF flues, flues run to the side of the boiler and the use
of additional bends etc. are detailed in the flue installation instructions provided with the boiler.
• Lower the boiler slowly onto the hanging bracket so
that the cross member at the rear of the boiler fully
engages onto the hanging bracket.
4.6
Removing the front case
• Remove the template from the wall and plug the
drilled holes using the wallplugs supplied.
4.3
2
Fitting the boiler hanging bracket
1
1
2
3
Fig. 4.4 Removing/fixing the front case
Fig. 4.3 Appliance with hanging bracket
• Fix the hanging bracket to the wall using the plugs and
screws provided with the appliance.
Note
Use alternative fixing holes where necessary.
Note
If the boiler is to be fitted in a timber framed
building ensure that the bracket is secured to a
substantial part of the timber frame capable of
taking the weight of the boiler.
4.4 Installing the flue system
• Install the flue system (refer to the seperate air/flue
duct installation instructions).
4.5 Fitting the boiler
• Lift the boiler (3) up to the wall so that it is slightly
above the hanging bracket (1).
18
To remove the front section of the case, proceed as follows:
• Loosen the screw (1) on the bottom of the unit.
• Push in the two retaining clips (2) on the bottom of
the appliance until the case is released.
• Grasp the front case by its bottom edge, pull it towards
the front and remove it by lifting it off the unit.
4.7
General instructions for heating system
Caution!
Thoroughly cleanse the heating system before
connecting the appliance!
By doing that, residue such as welds, cinder,
hemp, putty, rust, rough dust and similar substances are removed from the pipes. Otherwise
such substances can be deposited in the appliance and cause damage.
- The appliance is fitted with an expansion vessel (10
l/0.75 bar). Before assembling the appliance check if
this volume is adequate. If not, an extra expansion vessel must be installed, see section 3.10.5.
Instructions for installation and servicing ecoTEC
Boiler installation sequence 4
4.8
Gas connection
Note
With the spacer frame (Art. No 308 650), the
pipes can be fitted vertically upwards behind
the appliance. The distance of the appliance
from the wall thus increases by 65 mm.
Danger!
The gas connection may only be made by a
competent person.
The legal directives and the local regulations
for gas supply companies must be observed.
• Fit the union nut (6) and the compression olive (5) to
the pre-formed tail provided with ecoTEC plus appliances (7).
• Fully insert the service valve (4) onto the gas connection pipe and the pre-formed tail into the service valve.
Tighten both union nuts of the service valve.
• The diameter of the pipework (7) is 15 mm (22 mm for
37kW models). Connect a gas supply pipe of not less
than 15 mm diameter to the copper tail.
Note
Ensure the gas supply pipework is adequately
sized so that a 20 mbar gas pressure is available at the boiler inlet at full flow rate.
Caution!
Ensure a stress-relief assembly of the gas pipes
to avoid leakages!
Caution!
The gas regulating block may be tested for leakage only with a maximum pressure of 150 mbar!
Higher testing pressures can damage the gas
fitting.
Caution!
When making final connection to the boiler, if
using soldered fittings, extra care should be
taken to avoid damage to isolation valves
through heat transfer.
• Tighten all connections.
• Check the gas connection with leak indicator spray for
leakage.
4.9
Cold water mains inlet and hot water outlet
(ecoTEC combination boilers only)
Caution!
When making final connection to the boiler, if
using soldered fittings, extra care should be
taken to avoid damage to isolation valves
through heat transfer.
7
1
6
1
2
2
3
3
4
6
5
4
5
7
Fig. 4.6 Installing the hot and cold water connection (ecoTEC
plus combination boiler)
Fig. 4.5 Fitting the gas connection (example ecoTEC plus combination boiler)
• Fit the union nut (2) and the compression olive (3) to
the gas connection pipe (1) of the boiler.
Instructions for installation and servicing ecoTEC
19
4 Boiler installation sequence
4.10
Condensate drain pipe
bar
1
2
7
4
a
6
d
c
b
6
1
2
3
Internal
stackpipe
3
Internal
discharge system
5
7
Gulley
Soakaway
3
4
5
Fig. 4.7 Installing the hot and cold water connection (ecoTEC
pro combination boiler)
Note
Flush all foreign matter from the mains supply
before connecting to the boiler.
• Insert the seal (1) and connect the service valve (2) to
the appliance cold water connection.
• Fit the union nut (4) and the compression olive (3) to
the pre-formed tail provided with ecoTEC plus appliances (5). The diameter of the pipe is 15 mm.
• Fully insert the pre-formed tail into the service valve.
Tighten the union nuts.
• Insert the seal (7) and connect in the pipe (6) to the
appliance hot water connection. The diameter of the
pipe is 15 mm.
• Mount the handle for the filling loop with a countersunk screw to the service valve (2).
Fig. 4.8 Installing the condensate drain pipe (picture shows
ecoTEC plus combination boiler)
The ecoTEC plus appliances are fitted with a siphonic
trap (The filling height is 145 mm). The siphon collects
the accumulated condensate in a container of approx.
200 ml capacity and directs the entire content into the
drain pipe. The risk of the condensate drain pipe freezing is thus minimised.
The ecoTEC pro appliances are equipped with a normal
condensing water trap where the condensate is constantly emptied into the drain pipe.
• Connect the boiler condensate drain (1) to a condensate discharge pipe (2) which should be minimum of
19 mm internal diameter (22 mm external diameter for
any pipework installed external to the property) and
be made of an acid resistant material (e.g. plastic overflow pipe).
Note
The discharge pipe from the boiler condensate
drain must have a continuous fall (45 mm per
meter) and preferably be installed and terminated within the building to prevent possible freezing.
The condensate discharge pipe must terminate in a suitable position, e.g.:
a) preferably the discharge pipe should run and terminate internally to the house soil and vent stack (at
least 450 mm above the invert of the stack). A trap
giving a water seal of at least 75 mm (3) (built into the
boiler) should be incorporated into the pipe run, and
there must be an air break (4) in the discharge pipe
upstream of the trap. The connection to the stack
should not be made in a way that could cause cross
flow into any other branch pipe, or from that branch
pipe into the condensate drainpipe. This can be
achieved by maintaining an offset between branch
pipes of at least 110 mm on a 100 mm diameter stack
and 250 mm on a 150 mm diameter stack.
20
Instructions for installation and servicing ecoTEC
Boiler installation sequence 4
b)connecting into the internal discharge branch (e.g. sink
waste or washing machine) with an external termination, the condensate discharge pipe should have a
minimum diameter of 22 mm with no length restriction
and should incorporate a trap with a 75 mm (3) (built
into the boiler) seal. The connection should preferably
be made down stream of the sink waste trap. If the
connection is only possible upstream, then an air
break is needed between the two traps. This is normally provided by the sink waste.
c) terminating in a gully (5) below grid level (6) and
above the water level. The external pipe length should
be kept as short as possible to minimise the risk of
freezing and should not be more than 3 m.
d)at a condensate absorption point (soakaway) (7). The
external pipe length should not be more than 3 m.
Refer to ‘BS 6798 Specification for installation of gas–
fired boilers of rated input not exceeding 70 kW net’ for
further information. Before operating the boiler the condensate trap (1) must be filled with water as described in
relevant section.
4.11
Heating connection
• Insert the seal (1) and fit the service valve (2) to the
return connection of the appliance.
• Insert the seal (10) and fit the service valve (9) to the
flow connection of the appliance.
• Install the O-ring seal (12) on the return valve (11).
Note
Lay the filling loop hose (13) above the pipework
elbows.
• Fit the union nuts (4) and (7) as well as the compression olives (3) and (8) to the pre-bended 22 mm copper tails (5) and (6).
• Fully insert pipes (5) and (6) into the service valves.
Tighten the union nuts in this position.
• Fit the handle for the filling loop with a countersunk
screw to the service valve (9).
ecoTEC pro combination boiler
bar
Caution!
When making final connection to the boiler, if
using soldered fittings, extra care should be
taken to avoid damage to isolation valves
through heat transfer.
2
4.11.1 Heating flow and return connection
4
Note
Before connecting the heating circuit to the
boiler, all pipework and radiators must be thoroughly flushed to remove any installation
debris.
1
3
5
Fig. 4.10 Heating flow and return connection for ecoTEC pro
combination boiler
ecoTEC plus combination boiler
• Insert a seal (1) and fit the service valves (2) to the
flow and return connection of the appliance.
• Fit a union nut (4) and a compression olive (3) to the
22 mm pre-bended copper tail (5) .
• Fully insert pipe (5) into the service valve. Tighten the
union nuts in this position.
13
12
11
9
10
8
6
7
2
4
1
3
5
Fig. 4.9 Installing the heating flow and return connection for
ecoTEC plus combination boiler
Instructions for installation and servicing ecoTEC
21
4 Boiler installation sequence
Caution!
To ensure fumes do not escape through the
syphon of the boiler the trap must be filled with
water before the boiler is turned on. Therefore
the discharge pipework should be installed so as
not to interfere with the removal and refitting
of the condensate trap, we recommend the outlet pressure release valve pipe supplied is not
shortened.
You must leave a bottom clearance of at least
180 mm below the condensate trap for removal
and refitting.
ecoTEC plus system boiler
2
4
1
3
5
Fig. 4.11 Heating-side flow and return connection for ecoTEC
plus system boiler
• Insert a seal (1) and fit the service valves (2) to the
flow and return connection of the appliance.
• Fit a union nut (4) and a compression olive (3) to the
22 mm pre-bended copper tail (5) .
• Fully insert pipe (5) into the service valve. Tighten the
union nuts in this position.
The pressure release valve for the heating system is
integrated in the appliance.
• Position the seal (1) and screw the drain pipe (2) on to
the pressure release valve.
The discharge pipework should be as short as possible
and installed with a continuous fall away from the boiler.
The pipe should terminate in a position which ensures
that any discharge of water or steam from the valve cannot create a hazard to persons in or around the premises, or cause damage to any electrical components or
external wiring, and the point of discharge should be
clearly visible.
4.12 Connecting the flue system to the boiler
• Refer to separate air/flue duct installation instructions
included with the boiler.
4.11.2 Pressure Relief Valve
4.13
Electrical connection
4.13.1 General requirements
Danger!
Electrocution caused by touching live parts can
be fatal.
Before working on the appliance, turn off the
power supply and secure against restart.
min.
180
1
2
3
Fig. 4.12 Installing the drain pipe on the pressure release valve
of the heating system (picture shows ecoTEC plus
combination boiler)
22
All electrical work shall be carried out by a competent
person and shall comply with BS 7671 (IEE Regulations).
In the Republic of Ireland, reference should be made to
the current edition of the ETCI (Electro-Technical Council
for Ireland) rules. The boiler is supplied for connection
to 230 V, ~ 50 Hz supply fused at 3 A rating. Connection
to the mains supply shall be made via a fused 3 pin plug
to an unswitched shuttered socket, both complying with
the requirements of BS 1363.
(Alternatively, connection may be made via a 3 A fused
double pole isolator having a contact separation of at
least 3 mm in all poles and supplying the boiler and controls only). The point of connection to the mains supply
must allow complete electrical isolation of the boiler and
its ancillary controls. It should be readily accessible and
adjacent to the boiler. A 3 core flexible cord according to
BS 6500 tables 6, 8 or 16 (3 x 0.75 to 3 x 1.5 mm2)
should be used.
Instructions for installation and servicing ecoTEC
Boiler installation sequence 4
Danger!
This appliance must be earthed.
• Feed the power supply flex into the appliance and the
control panel through the cable clamps provided and
tighten.
Danger!
Mains connection terminals L and N remain live
even when the boiler on/off control is switched
off.
Note
Do not connect any power voltage to the connections 7-8-9 or BUS (+,-).
- + 7 89
L N
3 45
Note
Ensure that all cords pass through the cable
clamps in the rear of the control box and are
securely fixed. Ensure that the power supply is
connected such that the current carrying conductors become taut before the earth conductor
should the supply cord slip from the cable clamp.
- + 7 89
4.13.2 Connection to the main supply
• Remove the front case and lower the control panel.
L N
3 45
Fig. 4.14 Wiring system
• Connect the flex to the L, N and earth plug to the terminal block.
Green/yellow (earth) wire – boiler terminal Earth sign
Blue (neutral) wire
– boiler terminal N
Brown (live) wire
– boiler terminal L
Note
Do not connect any power voltage to the connections 7-8-9 or BUS (+,-).
Note
Ensure that the wires are securely fixed in the
terminal block.
• Refit the terminal box cover by pushing into place until
it clips back into position.
• Raise the control panel.
Fig. 4.13 Opening the electronics box
• Unclip the bottom of the terminal box cover and hinge
back to reveal the connection plugs.
Instructions for installation and servicing ecoTEC
23
4 Boiler installation sequence
4.13.3 Electric board layout
eBUS accessory connection
Burner cable harness
Accessory module connection
Diagnosis via eBUS,
vrnetDIALOG
outer probe
ext. flow or return probe
Hydraulic cable harness
Connection for external
eBUS controller
Room thermostat 24 V:
Connection 7, 8 and 9
No bi-directional
interface (analogue only)
Caution:
Do not connect
supply voltage!
Risk of damage
to electronics!
Mains supply: 230 V/50 Hz
Room thermostat 230 V/50 Hz
(remove bridge on connection)
Heating pump
With ecoTEC pro: 1-step pump (plug with 3-pin)
With ecoTEC plus: 2-step pump (plug with 5-pin)
2A fuse, slow
Igniter
Connection: 230 V
Supply for accessory module
Fig. 4.15 Connection wiring ecoTEC
24
Instructions for installation and servicing ecoTEC
Boiler installation sequence 4
NTC
return
NTC
flow
Ignition electrode
X 20/5 red
X 20/7 black
X 20/8 blue
X 20/7 black
X 20/13 black
Thermal fuse
X 20/12 black
Gas valve assembly
Fan unit
Plug
in
coupling
X 20/16 blue (earth)
X 20/4 grey (PWM)
X 20/3 black (Hall signal)
X 20/18 red (24 VDC)
X 20/17 red (24 VDC)
X 20/9 blue (earth)
X 2/16 black A
X 2/7 pink B
X 2/15 brown C
Water pressure sensor
X 2/8 blue D
Diverter valve
X 2/9 black
X 2/11 red
X 2/12 green
Pump
Aqua sensor
X 2/4 orange
X 2/3 red (+ 5V)
X 2/10 black
X 2/2 black (earth)
NTC
Plate heat
exchanger
X 2/6 green (signal)
X 2/5 violet (signal)
X 2/1 black
X2
X31
X 20
X41
— +
BUS
7
8 9
24V
L
N
3 4
230V
5
X12
X40
ecoTEC plus only:
NTC
Hot water
outlet
Electronic control box
Fig. 4.16 Connection wiring ecoTEC combination boiler
Instructions for installation and servicing ecoTEC
25
4 Boiler installation sequence
NTC
return
NTC
flow
Ignition electrode
X 20/5 red
X 20/7 black
X 20/8 blue
X 20/7 black
X 20/13 black
Thermal fuse
X 20/12 black
Fan unit
Gas valve assembly
Plug
in
coupling
X 20/16 blue (earth)
X 20/4 grey (PWM)
X 20/3 black (Hall signal)
X 20/18 red (24 VDC)
X 20/17 red (24 VDC)
X 20/9 blue (earth)
X 2/10 black
Hot water
contact C1/C2
X 2/14 brown
Pump
Water pressure sensor
X 2/9 black
X 2/11 red
X 2/12 green
X 2/4 orange
tank NTC
connection
X 2/10 black
X2
X31
X 20
X41
— +
BUS
7
8 9
24V
L
N
3 4
230V
5
X12
X40
Electronic control box
Fig. 4.17 Connection wiring ecoTEC system boiler
26
Instructions for installation and servicing ecoTEC
Boiler installation sequence 4
4.14 Controls
4.14.1 Vaillant controls and accessories
Controller
Item no.
Connection
VRC 400 (1-circuit controller, weather-controlled)
00 2001 0843
Installation in electronics box (plug-and-play)
VRT 360 (room temperature controller)
00 2001 0842
Wall-mounted, 2-wire bus
VRT 230 (room temperature controller)
00 2001 0841
timeSWITCH 140 (timer)
306 760
Wall-mounted, 3-wire connection to terminals 3-4-5
Installation in electronics box (plug-and-play)
timeSWITCH 130 (timer)
306 759
Installation in electronics box (plug-and-play)
VRT 30 (room thermostat)
300 637
Wall-mounted, 3-wire connection to terminals 3-4-5
Item no.
Connection
Telecommunication
vrnetDIALOG 830 (Int)
00 2000 3988
vrnetDIALOG 860/2 (Int)
00 2000 3984
Accessories
Item no.
GSM/GPRS, installation in electronics box (plug-and-play)
Wall-mounted, GSM/GPRS, up to 16 appliances
Connection
VR 65 control centre for UK cylinder installation (eBUS)
307 215
System solution for UK cylinder connection
vrDIALOG 810
306 743
Diagnostic software
Table 4.1 Vaillant controls and accessories
4.14.2 External electrical controls
The boiler terminals 3, 4 and 5 are for connecting external electrical controls such as a time switch and/or room
thermostat. Terminals 3 and 4 are linked together when
the boiler is supplied. If external controls are used, this
link must be removed, and the controls connected
across terminals 3 and 4. Terminal 5 is an additional
neutral connection for external neutrals such as from
the anticipator of a room thermostat.
4.14.3 Connection details for external time switches
and boiler terminal strip
20 VDC
7
8
9
(DO NOT USE 7, 8, 9 IN UK!)
L N
5
3 4
N
L
SWITCH
CONTACTS
3 A FUSE
ROOM
THERMOSTAT
MAINS
SUPPLY
230 V
50 Hz
L
N
CLOCK
N
4.14.4 Vaillant optional plug in timer accessories
Refer to the instructions supplied with the optional
accessories for connection details. Upon completion of
all electrical connections refit the terminal box cover by
pushing into place. The cover is secured by two locking
clips.
4.14.5 Connection details using the VR 65 Control
Center
The Control Center VR 65 is an eBUS system component.
In a storage unit installation, it is responsible for the
communication between the storage unit, the ecoTEC
plus system boilers and external 2- or 3-way-valves.
Connect the VR 65 Controll Center as described in the
enclosed manual.
4.15 Thermostatic radiator valves
The boiler has a built in automatic by-pass valve making
it ideal for use in systems with thermostatic radiator
valves (no separate system by-pass is required). For optimum fuel economy where TRV’s are used they must be
used in conjunction with a boiler control interlock. A programmable room thermostat or separate timer and
room thermostat will ensure complete boiler shut down
when the heating demand is satisfied. (The radiator in
the room containing the room thermostat should not be
fitted with a TRV).
Fig. 4.18 Connection details for time switches
If a room thermostat is to be connected in addition to a
time switch the wire between the time switch “ON” terminal and boiler terminal 4 should be broken by the contacts of the room thermostat (see schematic layout, fig.
4.18).
Instructions for installation and servicing ecoTEC
27
4 Boiler installation sequence
5 Commissioning Part I
4.16 Frost protection
The boiler has an integral frost thermostat which is
designed for protection of the boiler. To protect remote
or exposed parts of the heating system or property additional frost protection measures must be taken such as
the installation of an external frost thermostat. This
frost thermostat should be connected across the boiler
terminals 3 and 4, in parallel with any external heating
controls.
Note
External frost protection cannot be used when
plug in timers are utilised.
4.17 Circulating pump
The boiler incorporates a built in circulating pump that is
fully prewired (no additional wiring is necessary). The
pump incorporates an automatic overrun period after
the boiler switches off.
5
Commissioning Part I
5.1
Preliminary electrical checks
Check the electrical installation by carrying out short
circuit, earth continuity and resistance to earth tests and
a check for correct polarity.
5.2 Gas supply
The complete gas installation including the gas meter
must be inspected, checked for leaks and purged in
accordance with BS 6891. In IE the current edition of IS
813. The gas supply to the boiler can be purged by slackening the gas service valve beneath the boiler. Ensure
that there is adequate ventilation, extinguish all naked
flames and do not smoke whilst purging. After purging,
the gas service valve connection must be retightened
and checked for leaks. (The boiler itself does not require
purging as this will be done by the automatic burner
sequence control).
5.3
4.18 Anticycling ‘economiser’ control
The boiler incorporates a built in anticycling control to
ensure that energy wasteful short cycling of the boiler
cannot occur. This control prevents the boiler from reigniting for a preset period after central heating operation (the hot water operation is unaffected by this control and hot water can be drawn at any time).
Note
To temporarily override the anticycling control
turn the main boiler on/off switch to the off
position “0” and then back to the on position
“I” after a few seconds.
4.19 Automatic pump spin control (APS)
The boiler incorporates a built in control which will spin
the built in circulating pump and operate the diverter
valve (ecoTEC combination boilers only) once in a 23
hour period. This control helps to prevent seizure when
the boiler is not operated for a period of time. This control is not active when the power supply to the appliance
is turned off.
28
Cold water supply (ecoTEC combination boilers
only)
Open all domestic hot water taps supplied by the boiler,
turn on the mains water supply to the boiler and open
the mains water isolating valve below the boiler. Water
will now flow through the boiler to the hot taps. Starting
with the lowest tap supplied, turn the hot taps off one at
a time until the hot water pipework is purged of air.
Check all hot and cold water pipework for leaks.
5.4
Filling and bleeding the heating system
Note
The P.6 test program is for filling the heating
system: The diverter valve (combination boilers
only) moves to the centre position, the pump
does not run and the appliance does not go into
heating mode. Use the test program as
described in Section 8.4.
The P.0 test program is for bleeding the hot
water circuit (as well as the DHW circuit on
combination boilers): The appliance does not go
into heating mode; the pump runs inttermittently and bleeds the two circuits in succession.
Use the test program as described in Section
8.4.
Instructions for installation and servicing ecoTEC
Commissioning Part I 5
5.4.1 Checking the filling pressure of the heating
system
4
plus
pro
3
i
F
P
bar
1
2
2
1
bar
Fig. 5.2 Filling device ecoTEC plus combination boiler
Fig. 5.1 Checking the filling pressure of the heating system
Note
The ecoTEC appliances come with a manometer
and a digital pressure indicator.
The manometer allows you to quickly check
whether the filling pressure is in target range or
not even when the appliance is turned off.
If the appliance is in operation, you can display
the exact pressure by pressing the “-” (2).
For the heating system to operate properly, the indicator
on the manometer (1) must be in the dark grey area
when the system is cold. This corresponds to a filling
pressure between 1.0 and 2.0 bar. If the pointer is in the
light grey area, please refill water.
• Insert the double check valve (1) of the filling pipe at
the cold water shutoff valve and secure the double
check valve with the spring clip (2).
• To fill, first open the stop valve (3).
• Open the stop valve (4), so that water flows into the
heating system. Fill the heating system as described in
Section 5.4.4.
• Close both stop valves after filling and detach the filling device by pulling the double check valve from the
cold water stop valve.
Note
Both stop valves must be closed while operating the heating system and the filling pipe must
be again detached at the double check valve.
If the heating system extends over several storeys, the
system may require a higher filling pressure.
5.4.2 ecoTEC plus combination boiler filling loop
The ecoTEC plus combination boiler will be delivered
with a filling loop.
Fig. 5.3 Double check valve detached while heating
Instructions for installation and servicing ecoTEC
29
5 Commissioning Part I
5.4.3 Filling the heating system in ecoTEC pro combination boilers and ecoTEC plus system boilers
The ecoTEC pro combination boilers and the ecoTEC
plus system boilers do not come with a filling device. In
these appliances, water is filled in the heating system
through a filling pipe provided onsite.
• Join a hose between a cold water dispensing valve and
the filling pipe of the heating system.
• To fill, first open the cold water dispensing valve.
• Open the stop valve on the filling pipe, so that water
flows into the heating system. Fill the heating system
as described in Section 5.4.4.
• After filling, close the stop valve on the filling pipe and
the cold water dispensing valve and remove the filling
hose.
• Connect a hose to the drain valve located at the lowest position of the heating system.
• Open the 1/2” BSP drain taps and all vent valves on
the heating elements and allow the water to flow out
of the heating system and the boiler quickly and completely to remove all installation residue from the
heating system before commissioning the boiler.
• Close the 1/2” BSP drain taps.
• Fill the heating system again with water as described
in Section 5.4.4.
• Check that the pressure relief valve of the heating system is working by turning the handle on the valve.
• Check the pressure in the heating system and fill
water if needed.
• Close the filling valve and the cold water dispensing
valve.
5.4.4 Filling the heating system for the first time
5.6
Filling the condensate siphon
Note
As long as there is insufficient water pressure
in the heating system, the display indicator
changes between the error message F.22 and
the actual pressure indicator when the appliance is on.
Fill the heating system as follows:
• Open all heating element thermostat valves.
• Check if both stop valves on the heater are open.
• Only in ecoTEC plus combination boilers: Connect the
filling pipe as described in Section 5.4.2.
• Only in ecoTEC plus system boilers and in ecoTEC pro
combination boilers: As described in Section 5.4.3 join
a hose between the cold water dispensing valve and
the filling pipe of the heating system.
• Open the cold water dispensing valve.
• Slowly open the filling valve and let the water flow into
the heating system. Bleed the lowest radiator until the
water flows out at the bleed valve without bubbles.
• Bleed all other radiators until the heating system is
completely filled with water, all bleed valves have been
shut and the manometer pointer is in the centre of the
dark grey area. Bleed the heating pump by loosening
the central screw. Close the filling valve and the cold
water dispensing valve.
• Loosen the cap of the pump A.A.V. (automatic air vent)
(the appliance is ventilated independently by the pump
A.A.V. during continuous operation).
• Check all connections and the entire system for leaks.
5.5
1
Fig. 5.4 Filling the condensate siphon
Danger!
Note that if the boiler is run with an empty
condensate trap there is a danger that fumes
might escape into the room and cause poisoning. For this reason, it is important to ensure
that the trap is topped up each time the unit is
cleaned.
Initial system flush (“cold”)
Note
The complete heating system must be flushed
out at least twice: once cold, and once hot as
instructed below.
• Remove the lower part (1) of the condensate siphon by
turning the bayonet catch in anticlockwise direction.
• Fill the lower part with water until about 10 mm below
the upper edge.
• Refit the lower part of the condensate siphon.
• Check if all radiator thermostatic valves and both service valves on the boiler are open.
30
Instructions for installation and servicing ecoTEC
Commissioning Part I 5
5.7
Adjusting the pumping capacity
5.9
Checking the gas supply
Only in ecoTEC plus boilers:
The capacity of the two-stage pump can be adjusted to
the requirements of the heating system. If needed,
change the setting of the operating mode dependent
pump speed under the diagnostic number “d.19” (see
section 8.1.2).
5.9.1 Factory settings
5.8 Adjusting the by-pass
The appliances have an adjustable by-pass valve.
The pressure can be adjusted between 170 and 350 mbar.
Approx. 250 mbar is preset (mid-position). The pressure
changes by approx. 10 mbar each time the adjusting
screw is rotated. By turning right, the pressure increases
and turning left decreases it.
The boiler is supplied ready adjusted and no further gas
adjustments are necessary, however both the gas inlet
working pressures and maximum gas rates should be
checked as detailed in 5.9.2 and 5.9.3.
1
Caution!
Before operating the boiler check the data
badge and ensure that the correct gas type
appliance has been installed.
5.9.2 Gas inlet working pressure
Check the inlet pressure as described below:
• Remove the front case from the boiler.
• Close the gas shutoff valve fitted to the boiler.
1
Fig. 5.11 Adjusting the by-pass valve (in combination boilers)
1
2
Fig. 5.13 Checking the gas supply pressure
Fig. 5.12 Adjusting the by-pass valve (in system boilers)
• Regulating the by-pass on the adjusting screw (1).
Instructions for installation and servicing ecoTEC
• Loosen the sealing screw marked “in” (1) on the gas
valve assembly.
• Connect a digital or a U gauge (2).
• Open the gas shutoff valve fitted to the boiler.
• Put the boiler into operation (refer to the Instructions
for Use supplied with the boiler).
• Check the U gauge reading and ensure the inlet gas
pressure is between the pressures detailed below.
31
5 Commissioning Part I
Natural gas:
DO NOT proceed with adjustment or attempt to
put the unit into service if the inlet working
pressure lies outside the 17–25 mbar range.
5.10
Refitting the case
2
LPG:
DO NOT proceed with adjustment or attempt to
put the unit into service if the inlet working
pressure is lower than 37 mbar.
1
• Turn off the appliance, remove U gauge.
• Tighten the test point screw and check for leaks.
• Record appliance working gas inlet pressure (mbar) in
the Benchmark gas boiler commissioning checklist.
5.9.3 Checking the gas rate
The boiler is fitted with a fully modulating automatic gas
valve which ensures that the precise air/gas ratio is provided under all operating conditions.
The gas rate has been set during production and does
not require adjustment.
The gas rate of the boiler should be checked with the
front case fitted as follows:
• Activate full gas rate mode by simultaneously pressing
the “+” and “–” buttons on the display system (for
ecoTEC combination boilers fully open the hot water
tap to maximum water flow rate).
• Wait at least 5 minutes, or until the boiler has reached
its operating temperature.
• With all other gas appliances turned off measure the
gas rate at the gas meter. Check that the gas rate is as
stated in Table 5.1.
Fig. 5.14 Refitting the case
• Hook the top of the front casing over the lip on the
top of the boiler chassis and push the bottom of the
front casing into place.
• Ensure the spring retaining clips (2) engage correctly.
• Tighten case securing screw (1).
Caution!
If the measured gas flow volume lies outside
the tolerance limits specified in Table 5.1, do not
operate the appliance and inform the Vaillant
Customer Service.
Gas rate
Appliance
Maximum net
heat input in kW
Natural gas in m3/h
Propane in kg/h
nominal
+ 5%
- 10%
nominal
+ 5%
- 10%
ecoTEC plus 612
12.2
1.30
1.37
1.17
0.95
1.00
0.86
ecoTEC plus 615
15.3
1.60
1.68
1.44
1.19
1.25
1.07
ecoTEC plus 618
18.4
1.90
2.00
1.71
1.43
1.50
1.29
ecoTEC plus 624
24.5
2.60
2.73
2.34
1.90
2.00
1.71
ecoTEC plus 630
30.6
3.20
3.36
2.88
2.38
2.50
2.14
ecoTEC plus 637
37.8
4.00
4.20
3.60
2.94
3.09
2.65
ecoTEC plus 824
23.5
2.50
2.63
2.25
1.82
1.91
1.64
ecoTEC plus 831
31.6
3.30
3.47
2.97
2.46
2.58
2.21
ecoTEC plus 837
37.8
4.00
4.20
3.60
2.94
3.09
2.65
ecoTEC pro 28
28.6
3.00
3.15
2.70
2.22
2.33
2.00
Table 5.1 Gas rates
32
Instructions for installation and servicing ecoTEC
Commissioning Part I 5
Functional checks (commissioning part II) 6
5.11
Adjusting the central heating output (range
rating)
The boilers are fully modulating for central heating, and
it is therefore not necessary to range rate the boiler.
However, if desired, it is possible to range rate the boiler,
as follows:
• Press the “i” and “+” buttons simultaneously.
• Keep the “+” button pressed until “d.0” is displayed.
Note
The display runs from “d.0” to “d.99” before
restarting at “d.0”.
• Press the “i” button. The “=” symbol is displayed. The
part load setting is now displayed in kW.
• Use the “+” and “–” buttons to increase or decrease
the value in steps of 1 kW. The displayed value will
flash while the adjustment procedure is being carried
out. The available ranges of settings are given in Table
5.2.
• Push the “i” button for about five seconds, or until the
display stops flashing. The value is now saved to memory. The display will now return to its normal state
(current heating system flow temperature, e.g. 45 °C).
• Press the “i” and “+” buttons simultaneously to cancel
adjustment mode.
Adjustment mode is also cancelled if no button is
operated for a period of 4 minutes.
Appliance
ecoTEC plus 612
ecoTEC plus 615
ecoTEC plus 618
ecoTEC plus 624
ecoTEC plus 630
ecoTEC plus 637
ecoTEC plus 824
ecoTEC plus 831
ecoTEC plus 837
ecoTEC pro 28
6
Functional checks (commissioning
part II)
6.1
Functional checks
6.1.1 Procedure
After installing and checking the gas supply pressure,
perform a function check before commissioning the
appliance and handing over to the user.
• Commission the appliance according to the relevant
operating manual.
• Check the gas supply pipe, exhaust system, heating
system and the hot water lines (combination boilers
only) for leaks.
• Check that the flue system has been installed properly
according to the flue system assembly manual.
• Check for ignition and an even flame on the burner.
• Perform a function check on the heating system (see
section 6.1.2) and the water heating (combination boilers only, see section 6.1.3).
• Hand over the appliance to the user (see section 6.2).
Heating output in kW
5 – 12
5 – 15
7 – 18
9 – 24
10 – 30
12 – 37
7 – 19
9 – 24
12 – 28
9 – 24
Table 5.2 Heating system part load adjustment ranges
5.12
Gas changeover
Fig. 6.1 Function check
Note
To reset the appliance from natural gas to LPG
mode, you need the Vaillant conversion kit Art.
No. 00 2001 0641.
To reset the appliance from LPG to natural gas
mode, you need the Vaillant conversion kit Art.
No. 00 2001 0642.
Convert the appliance as described in the conversion kit.
Instructions for installation and servicing ecoTEC
33
6 Functional checks (commissioning part II)
6.1.2 Heating
• Switch on the appliance.
• Make sure that there is a heating demand.
• Press “i” to activate the status indicator.
As soon as a heat demand is received, the appliance
runs through the status indicators “S. 1” to “S. 3”, until
the appliance is running correctly in normal mode and
the display shows “S. 4”.
plus
pro
Fig. 6.2 Display indicator during heating mode
6.1.3 Water heating (combination boilers only)
• Switch on the appliance.
• Fully open the hot water tap.
• Press “i” to activate the status indicator.
If the water heating is working correctly, the display
shows the following: “S.14”.
plus
pro
Fig. 6.3 Display indicator during water heating
6.1.4 Final flush of the heating system (“hot”)
• Operate the appliance until the appliance and the
heating system are up to temperature.
• Check the heating system for leaks.
34
• Connect a hose to the drain valve located at the lowest position of the heating system.
• Shut off the appliance, open the drain valve and all
bleed valves on the radiators and allow the water to
flow out of the heating system and the boiler quickly
and fully.
• Close the drain valve.
• Fill the heating system again with water as described
in Section 5.4.4.
• Release water from the system until the system design
pressure of 1.0 bar is attained. (The actual reading on
the digital pressure gauge should ideally be 0.5 bar
plus an additional pressure corresponding to the highest point of the system above the base of the boiler –
10 m head equals an additional 1 bar reading on the
pressure gauge. The minimum pressure should not be
less than 1 bar in any installation.) If the system is to
be treated with an inhibitor it should be applied at this
stage in accordance with the manufacturer’s instructions. Further information can be obtained from
Sentinel, Betz Dearborn Ltd., Tel: 0151 420 9595, or
Fernox, Alpha–Fry technologies. Tel: 0870 8700362.
• Refit the boiler casing (see section 5.10).
• Only in ecoTEC plus appliances: Attach the bottom
cover to the boiler by sliding the front edge of the
cover into the lip at the bottom front edge of the
appliance chassis.
• Carefully push the rear of the bottom cover upwards
until the spring retaining clips engage at the side of
the appliance. It may be necessary to adapt the bottom cover by removing the easy break sections.
6.2
Handing over to the user
Note
When you have finished the installation, attach
the sticker supplied (835593) to the appliance
in the user’s language.
• Set the maximum radiator temperature control to the
desired setting.
• Set the maximum hot water temperature control to
the desired setting.
• Instruct the user in the safe and efficient operation of
the boiler, in particular the function of
– the boiler on/off control
– the maximum radiator temperature control
– the maximum hot water temperature control (combination boilers only)
– the pressure gauge
• Show the user how to operate any external controls.
• Explain to the user the importance of having the boiler
regularly serviced by a competent servicing company.
To ensure regular servicing, it is strongly recommended that arrangements are made for a Maintenance
Agreement. Please contact Vaillant Service Solutions
(0870 6060 777) for further details.
• Record central heating operating pressure in the
Benchmark gas boiler commissioning checklist along
Instructions for installation and servicing ecoTEC
Functional checks (commissioning part II) 6
Inspection and maintenance 7
with the heat input (kW) and temperature difference
between flow and return.
• Leave the user instructions and the installation
instructions with the user.
6.3 Vaillant warranty
Vaillant provide a full parts and labour warranty for this
appliance.
The appliance must be installed by a suitably competent
person in accordance with the Gas Safety (Installation
and Use) Regulations 1998, and the manufacturer’s
instructions. In the UK ‘CORGI’ registered installers
undertake the work in compliance with safe and satisfactory standards.
All unvented domestic hot water cylinders must be
installed by a competent person to the prevailing building regulations at the time of installation (G3).
Terms and conditions apply to the warranty, details of
which can be found on the warranty registration card
included with this appliance.
Failure to install and commission this appliance in compliance with the manufacturer’s instructions may invalidate the warranty (this does not affect the customer’s
statutory rights).
7
Inspection and maintenance
7.1
Initial inspection
To ensure the continued safe and efficient operation of
the boiler it is recommended that it is checked and serviced as necessary at regular intervals. The frequency of
servicing will depend upon the particular installation
conditions and usage, but in general once per year
should be adequate.
Danger!
It is law that all servicing work is carried out by
a competent person (CORGI registered).
Inspections/Maintenance work not carried out
by a competent person can result in damage to
property and personal injury.
Only genuine Vaillant spare parts may be used for
inspections, maintenance and repair work to ensure the
long-term working order of all functions of your Vaillant
appliance.
Any spare parts which might be required are contained
in the current spare parts catalogues.
Information can be obtained from Vaillant Customer
Service Centres.
7.1.1 Safety instructions
Important:
Before starting any maintenance work:
Instructions for installation and servicing ecoTEC
• Isolate the mains electricity supply by disconnecting
the plug at the socket outlet (if there is only an isolating switch remove the fuse from the switch).
• Turn OFF the gas supply at the gas service valve fitted
to the boiler.
• When removing any water carrying components
ensure that water is kept away from all electrical components.
• Always use new seals and O–rings when parts are
replaced.
• Always test for gas soundness and always carry out
functional checks after any service work and after
replacing any gas carrying component.
• Always check earth continuity, polarity and resistance
to earth with a multimeter after any service work and
after replacing any electrical component.
Danger!
Electrocution by touching live parts can be
fatal!
The supply terminals in the appliance switch
box are live even if the main ON/OFF switch is
turned off.
Protect the switch box from spray water.
Before working on the appliance, turn off the
power supply and secure against restart!
Always perform the following steps after completing any
inspection tasks:
• Open the service valves in the heating flow and return
and in the cold water inlet (combination boilers only).
• If necessary, refill the device with cold water up to a
pressure of approx 1.5 bar and bleed air from the
entire heating system.
• Open the service valve of the gas supply pipe.
• Turn on the power supply and the main switch.
• Check the appliance for gas and water leaks.
• Fill and bleed air from the heating system again, if
necessary.
Note
If it is necessary to keep the main switch on for
certain inspection and maintenance, this is indicated in the description of the maintenance
task.
Note
The boiler is fitted with a combustion analysis
test point. A suitable combustion analyser can
be connected to this point to establish the combustion performance of the boiler. Checking/
adjustment of this value is required in the following instances; replacement of gas valve, conversion to or from Natural Gas/ LPG or if incorrect combustion is suspected (see section 9.7).
35
7 Inspection and maintenance
7.1.2 Maintenance
Before commencing any servicing or maintenance work,
carry out an initial inspection of the system as follows:
• Inspect the flue, pipework and electrical connections
for indications of damage or deterioration.
• Inspect the air supply and ventilation arrangements of
the installation.
• Check the heating and water system, in particular the
condition of radiator valves, evidence of leakage from
the heating system and dripping hot water taps.
7.1.3 Overview of the inspection and maintenance
tasks
No. Activity
1
1) Inspection
2) Maintenance
must be carried recommended
out once a year every fifth year
x
x
4
Check the air/ gas flue system and ensure it is not blocked, damaged and is fitted correctly.
Measure the gas rate during operation (see table 5.1. inside the chapter commissioning part I).
If the gas rate is lower the minimum gas rate follow the maintenance instructions (column 2)!
Check combustion by measuring CO and CO2 values, compare to table 9.2. If the measurement
is outeside the tolerances follow the maintenance instructions! In the case that no flue gas
analyser is available check ignition and burner flame picture visually.
Isolate the device from the electrical mains supply, close the gas supply and service valves.
5
Remove the burner module (as described in section 7.2.1).
x
6
Clean primary heat exchanger.
x
x
2
3
7
Check whether the burner is dirty.
8
Refit burner module, replace burner door seal and nuts! (Spare part number 0020025929).
9
Check all appliance electrical connections and make adjustments, if necessary.
x
x
x
x
x
x
x
x
10 Check/re-pressurise expansion vessel as necessary.
x
x
11
x
x
Check appliance generally, check for dust in the appliance and clean if necessary.
12 Check and clean condensate trap and flexible condensate hose.
x
x
13 Open the gas supply and switch on the device.
Perform a test operation of the appliance and heating system, including water heating and
14
bleed system, if necessary.
Re-pressurise the appliance/system up to approx. 1.0 - 2.0 bar (depending on the static height
15
of the system).
Measure the gas rate during operation and ensure it is inside the tolerances (see table 5.1
16
inside the chapter commissioning part I).
Re-check combustion by measuring CO and CO2 values, compare to table 9.2. Ensure that the
17 measurement is inside the tolerances. In the case that no flue gas analyser is available check
ignition and burner flame picture visually.
18 Check boiler for any leaks.
x
x
x
x
x
x
x
x
19 Complete gas boiler commissioning checklist (Benchmark).
x
x
x
x
Table 7.1 Inspection and maintenance steps
7.1.4 Functional check of boiler operation
• Carry out a functional check of the boiler operation as
previously detailed.
• Remove the appliance casing as detailed and operate
the boiler.
• Inspect the burner operation through the viewing window.
• Check that the flames are evenly covering the surface
of the burner.
• Inspect for signs of excessive flame lift or sooting.
36
Instructions for installation and servicing ecoTEC
Inspection and maintenance 7
7.2
Servicing the burner module
Caution!
Damage to corrugated gas pipe!
Under no circumstances must the burner module be suspended from the flexible corrugated
gas pipe.
7.2.1 Removing the burner module
The burner module consists of the burner, fan, gas valve
und the gas supply (mixer tube). These four components
make up the complete assembly, the burner module.
Danger!
There is danger of being injured or burnt by the
burner module and at all components carrying
water. Only carry out work on these components once they have cooled down.
Proceed as follows to remove it:
• Turn off the boiler
• Isolate the electrical supply to the boiler.
• Remove boiler bottom cover by releasing the two
spring retaining lugs and lowering the rear of the bottom cover.
• Gently pull the bottom cover backwards to remove
from the appliance.
• Turn off the gas service valve.
• Turn off the boiler CH service valves.
• Loosen screw, release the front case spring retaining
clips located beneath the front edge of the appliance.
• Remove the front casing by easing forward the bottom
edge and gently lifting.
• Lower electronic control box.
1
2
4
11
10
9
5
6
8
7
Fig. 7.2 Dismantling burner module
• Disconnect HT lead (5) and earth lead (6) from spark
electrode.
• Remove four nuts (4) from burner manifold.
• Disconnect two electrical connections (7 and 8) from
fan and gas valve.
• Pull forward and remove burner, gas valve and fan
assembly (9) from integral condensation heat
exchanger (10).
Note
You can suspend the burner module on the hook
(11) while carrying out maintenance tasks.
• After removing the thermal compact module, clean
the components as described below.
7.2.2 Cleaning the integral condensation heat
exchanger
3
Caution!
Protect the electronics box against sprayed
water.
Fig. 7.1 Dismantling air intake pipe
• Remove screw (2) and remove the air intake pipe (1).
• Disconnect the gas supply (3) on the gas valve. Ensure
the corrugated gas pipe does not twist by holding the
flattened section of the pipe, with an open ended
spanner, whilst loosening the union nut.
Instructions for installation and servicing ecoTEC
37
7 Inspection and maintenance
• Check the burner surface for damage, replace the
burner if necessary.
• After checking/replacing the burner, re-assemble the
burner module in the boiler as described in Section
7.2.4.
1
7.2.4 Refitting the burner module
1
2
3
4
Fig. 7.5 Replacing the burner door seal
• Insert a new seal (1) in the burner door.
Fig. 7.3 Cleaning the integral condensation heat exchanger
Caution!
The burner door seal (1) and the self-locking
nuts on the burner module (Art. No.:
00 2002 5929) must be replaced each time the
module is removed (for example during maintenance, see table 7.1). If the burner flange insulation on the burner module (Art. No.: 210 734)
shows any signs of damage other small cracks
it must also be replaced.
• Dismantle the burner module as described under 7.2.1.
Caution!
Risk of damaging the primary heat exchanger!
Do not attempt to loosen nor retighten the four
screws (1).
With the burner and fan assembly removed it is now
possible to inspect the main heat exchanger (4).
• Remove any loose deposits from the heating spirals
(3) using a soft brush and jet of water (ensure that
water is kept away from all electrical components. Any
water used to clean the main heat exchanger will drain
through the condensate trap). Avoid pointing the
water jet directly at the insulating surface (2) on the
back of the heat exchanger.
If required the heat exchanger can be cleaned using regular vinegar.
4
10
9
5
7.2.3 Checking the burner
1
6
8
7
Fig. 7.6 Refitting the burner module
Fig. 7.4 Checking burner
The burner (1) is maintenance-free and needs no cleaning.
38
• Insert the burner module (9) in the integral condensation heat exchanger (10).
• Tighten the four nuts (4) on the alternate left and
right sides until the burner door fits closely and uniformly to the stop surfaces.
Instructions for installation and servicing ecoTEC
Inspection and maintenance 7
• Reconnect the HT lead (5) and earth lead (6) to the
spark electrode.
• Insert the cables (8) on the fan motor and the cable
(7) on the gas fitting.
7.3
Cleaning the condensate siphon
1
2
1
3
Fig. 7.9 Cleaning the condensate siphon
Fig. 7.7 Refitting the gas supply
• Reconnect the gas supply (3) to the gas valve, ensuring that a new sealing washer is used and correctly
located. Use the spanner flat at the flexible gas line to
hold the gas fittings.
Danger!
Note that if the boiler is run with an empty
condensate trap there is a danger that fumes
might escape into the room and cause poisoning. For this reason, it is important to ensure
that the trap is topped up each time the unit is
cleaned.
• Remove the lower part (1) of the condensate siphon by
turning the bayonet catch in anticlockwise direction.
• Clean the siphon part section by rinsing it out with
water.
• Fill the lower part with water until about 10 mm below
the upper edge.
• Fasten the lower part again on the condensate siphon.
11
Fig. 7.8 Testing the gas supply for soundness
• Turn on the gas supply and test for soundness. Check
especially the screwed connections (3) and (11).
• Refit the air inlet pipe, ensuring that the blue seal in
the air intake pipe is correctly located.
Instructions for installation and servicing ecoTEC
39
7 Inspection and maintenance
8 Troubleshooting
7.4
Checking the expansion vessel
• Fill out the Benchmark gas boiler commissioning
checklist at the rear of this guide.
1
Fig. 7.10 Checking expansion vessel admission pressure
Fig. 7.11 Function check
Note
It is not necessary to perform this check every
year – a check every three years is sufficient.
•
•
•
•
Ensure the boiler CH service valves are closed.
Release the pressure from the boiler.
Remove valve cap from expansion vessel charge point.
Check that the internal charge pressure of the expansion vessel is between 0.75 and 0.9 bar.
If the pressure is lower than this the vessel should be
repressurised using an air pump.
• Refit the valve cap.
• Repressurise boiler and heating system.
7.5
Recommissioning the boiler
• Carry out electrical safety checks.
• Turn on the electrical supply.
• Open the boiler CH service valves.
• Carry out function checks of boiler operation as previously detailed.
• Check gas rate as previously detailed.
• Check for water leaks.
• Refit case, ensuring that a good seal is obtained.
7.6
Test operation
Always perform the following checks after completing
any maintenance task:
• Commission the appliance according to the relevant
operating manual.
• Check the appliance for gas and water leaks.
• Check the air/flue gas system for leaks, check its fastening
• Check for ignition and an even flame on the burner.
• Check that the heating system and the water heating
is working (combination boilers only).
40
8
Troubleshooting
8.1
Logical fault finding procedure
These checks must be carried out before attempting to
use the fault finding guide.
1. Carry out electrical safety checks (see section
‘Preliminary Electrical Checks’).
2. Check that the external electricity supply to the boiler
is on, and a supply of 230 V~ is present between boiler
terminals ‘L’ and ‘N’.
3. Check that the gas supply to the boiler is on, that it
has been correctly purged and that an inlet pressure
of 20 mbar is available at the gas valve. (See section
‘Gas Supply’).
4. Ensure the heating system is full of water and charged
to between 1 and 1.5 bar. If not, refill and vent the system. (See section ‘Filling the heating system’). Ensure
boiler flow and return service valves are open.
5. Check that the main on/off control is set to the ‘on’
position.
6. Set the central heating temperature to maximum.
7. Set the domestic hot water temperature to maximum
(combination boilers only).
8.Check that all external controls are on and calling for
heat (if no external controls are fitted, boiler terminals
3 and 4 must be linked). Check that the boiler anti–
cycling economiser is not engaged.
Instructions for installation and servicing ecoTEC
Troubleshooting 8
8.1.1 Status codes
The status codes that you can see on the display provides information about the current operating condition
of the appliance.
The display of the status codes can be called as follows:
plus
pro
Display
Meaning
Warm start (ecoTEC combination boilers only) / Charge hot
water cylinder (ecoTEC system boilers only):
S.20
Warmstart demand
S.21
Fan running
S.22
Pump running
S.23
Ignition sequence
S.24
Burner ignited
S.25
Fan and water pump running
S.26
Fan over run
S.27
Pump over run
S.28
Anti cycling mode
All boilers:
S.30
S.31
S.32
S.34
S.36
Fig. 8.1 Display of status codes
S.41
S.42
• Press the “i” key.
The display shows the status code, e.g. S.4 for “Burner
mode - Heating”.
S.52
S.53
No heating demand from external controls (clamp 3-4
open)
Central heating thermostat knob turned off or no heat
demand by the eBUS control unit
Heat exchanger antifreeze active, as fan speed variation is too high. Appliance is within the waiting time of
the operation block function
Antifrost mode active
No heating demand from low voltage controls (clamp
7-8-9)
Water pressure > 2,9 bar
Response from accessory modul or defective condensate pump is blocking burner operation
Water pressure > 2,9 bar
Appliance is within the waiting period of the operation
block function due to water shortage (VL-RL spread too
big)
Appliance is within the waiting period of the operation
block function due to water shortage (temperature
gradient)
Return-sensor check is running, demand (DHW or heating) is blocked
Water pressure sensor check is running, demand (DHW
or heating) is blocked
Flow-/Return-sensor check is running, demand (DHW or
heating) is blocked
The display of the status codes can be cancelled as follows:
• Press the “i” key
or
• Do not press any key for about 4 minutes.
The current heating flow temperature appears in the
display again.
S.54
Display
Table 8.1 Status codes (continued)
Meaning
S.96
S.97
S.98
Heating mode (all models):
S. 0
S. 1
S. 2
S. 3
S. 4
S. 5
S. 6
S. 7
S. 8
Domestic
No heat demand
Fan running
Water pump running
Ignition sequence
Burner ignited
Fan and pump running
Fan over run
Pump over run
Anti cycling mode
hot water mode (ecoTEC combination boilers only):
S.10
S.11
S.13
S.14
S.15
S.16
S.17
Hot water demand
Fan running
Ignition sequence
Burner ignited
Fan and pump running
Fan over run
Pump over run
8.1.2 Diagnostic codes
In the diagnostic mode, you can change certain parameters or display more information.
The diagnostic information is divided into two diagnostic
levels. The second diagnostic level can be reached only
after entering a password.
Caution!
Access to the second diagnostic level must be
used exclusively by a qualified technician.
Table 8.1 Status codes
Instructions for installation and servicing ecoTEC
41
8 Troubleshooting
First Diagnostic level
• Press the “i” and “+” keys simultaneously.
The display shows “d.0”.
• Use the “+” or “–” keys to scroll through the desired
diagnostic numbers of the first diagnostic level (see
table 8.2).
• Press the “i” key.
You can end the diagnostic mode as follows:
• Press the “i” and “+” keys simultaneously.
or
• Do not press any key for approx. 4 minutes.
The current heating flow temperature appears in the display again.
The display shows the relevant diagnostic information.
• If necessary, use the “+” or “–” keys to change the
value (display flashes).
• Save the new value by holding down the “i” key for
approx. 5 seconds until the display no longer flashes.
Display Meaning
d. 0
d. 1
d. 2
d. 3
d. 4
d. 5
d. 6
d. 7
d. 8
d. 9
d.10
d.11
d.12
d.13
d.22
d.23
d.25
d.30
d.33
d.34
d.35
d.36
d.40
d.41
d.44
d.47
d.67
d.76
d.90
d.91
d.97
Heating part load
Water pump over run time for heating mode
Max. burner anti cycling period at 20 °C Flow temperature
Hot water flow temperature reading (combination boiler
only)
Current temperature for warm start sensor
(combination boilers only)
Current storage tank sensor (system boilers only)
Flow temperature target value or return target value
when return regulation is set.
Hot water temperature target value
Warm start temperature target value
(ecoTEC plus combination boiler only)
Storage temperature target value (system boiler only)
External controls heat demand (Clamp 3-4)
Display value/adjustable value
Adjustable heating part load in kW (factory setting: max. output)
2 - 60 min (factory setting: 5 min)
2 - 60 min (factory setting: 20 min)
in °C
in °C
in °C, max. the value set in d.71
Limited by the eBUS controller (if an eBUS controller is connected)
in °C, 35 to 65 °C
in °C, 40 to 65 °C
in °C, 15 °C for left stop, then 40 to 70 °C
0 = open (no heat request)
1 = closed (heat request)
Flow target temperature from external analogue regula- in °C, minimum from ext. eBUS target value and target value terminal
tor to terminal 7-8-9/eBUS
7
Status internal heating pump
1 = on, 0 = off
Status external heating pump
1 to 100 = on, 0 = off
Cylinder charging pump (via accessory module)
1 to 100 = on, 0 = off
Hot water circulation pump (via accessory module)
1 to 100 = on, 0 = off
Hot water demand
1 = on, 0 = off
Summer/Winter function
1 = Winter, 0 = Summer
Hot water activation via eBUS Control
1 = yes, 0 = no
Control signal for both gas valves
1 = on, 0 = off
Fan speed target value
in rpm/10
Fan speed actual value
in rpm/10
Position of diverter valve (combination boilers only)
0 = Heating; 100 = Hot water; 40 = Centre position
Hot water flow sensor
in l/min
Flow temperature
Actual value in °C
Return temperature
Actual value in °C
Digitised ionisation potential
Display range of 0 to 102, > 80 no flame, < 40 even flame
Outside temperature
Actual value in °C
(with weather compensating Vaillant controller only)
Remaining burner anti cycling time
in min
Appliance variant (device specific number)
00 to 99
Digital regulator status
1 = identified, 0 = unidentified (eBUS Address <=10)
DCF status with connected external probe with DCF77 0 = no reception, 1 = reception, 2 = synchronised, 3 = valid
receiver
Activation of the second diagnostic level
Password: 17
Table 8.2 Diagnostic codes of the first diagnostic level
42
Instructions for installation and servicing ecoTEC
Troubleshooting 8
Second diagnostic level
• As described above in the first diagnostic level, scroll
through the diagnostic number d.97.
• Change the displayed value to 17 (password) and press
the “i” button.
You are now in the second diagnostic level where all
information from the first diagnostic level (see table 8.2)
and the second diagnostic level (see table 8.3) is displayed.
Display Meaning
d.17
d.18
d.19
Heating flow/return regulation changeover
Pump mode (return)
Only in ecoTEC plus:
Operating modes of the two-speed heating pump
d.20
d.27
Maximum set value for target cylinder temperature
(system boilers only)
Switching accessory relay 1 in the accessory module
d.28
Switching accessory relay 2 in the accessory module
d.50
d.51
d.58
d.60
d.61
d.64
d.65
d.68
d.69
d.70
d.71
d.72
d.73
d.75
d.77
Scrolling and changing values and exiting the diagnostic
mode is done as described in the first diagnostic level.
Note
After exiting the second diagnostic level, if you
press “i” and “+” within 4 minutes, you will
directly reach the second diagnostic level without having to enter the password again.
Display value/adjustable value
0 = flow, 1 = return (factory setting: 0)
0 = return, 1 = nonstop, 2 = winter (factory setting: 0)
0 = pre ignition speed 1, hot water or heating speed 2, overrun speed
1
1 = pre ignition speed 1, hot water speed 2, heating speed 1, overrun
speed 1
2 = like 1, but speed in heating mode dependent on heating part load
d. 0 (if d.0 is below 60% of full load, then pump speed 1, otherwise speed 2)
3 = always speed 2
(factory setting: 2)
Setting range: 50 to 70 °C (factory setting: 65 °C)
1 = Circulation pump (default)
2 = Ext. pump
3 = Storage charging pump
4 = Flue gas flap/extractor hood
5 = External gas valve
6 = External error message
1 = Circulation pump
2 = Ext. pump (default)
3 = Storage charging pump
4 = Flue gas flap/extractor hood
5 = External gas valve
6 = External error message
Offset for minimum speed
in rpm/10, adjustment range: 0 to 300
Offset for maximum speed
in rpm/10, adjustment range: -99 to 0
From the third quarter of 2006:
Setting range: 0 to 3
Activation of solar reheating
0 = solar reheating disabled (factory setting)
3 = activation of min. hot water target value = 60 °C for solar
reheating
Number of safety temperature limiter cut offs
Quantity
Number of lock outs
Number of unsuccessful ignitions in the last attempt
Average ignition time
in seconds
Maximum ignition time
in seconds
Unsuccessful ignitions in the first attempt
Quantity
Unsuccessful ignitions in the second attempt
Quantity
Set diverter valve position
0 = Normal mode (factory setting)
1 = Centre position
2 = permanent heating position
Maximum setting of heater control knob
Adjustment range in °C: 40 to 85 (Factory setting: 75)
Pump overrun time after warm start (combination boil- Adjustment range in sec: 0, 10, 20 to 600
ers only) or charging an electronically controlled hot
Factory setting for combination boilers: 80
water storage through C1-C2 (system boilers only)
Factory setting for system boilers: 300
Offset for warm start target value (combination boilers Adjustment range: -15 K to +5 K (Factory setting: 0 K)
only)
Maximum charging time for a storage without own con- Adjustment range in min: 20, 21, 22 to 90 (Factory setting: 45)
troller (system boilers only)
Storage partial load (storage charging capacity limit,
Adjustment range in kW: appliance-specific
system boilers only)
Factory setting: max. output
Table 8.3 Diagnostics codes of the second diagnostic level
Instructions for installation and servicing ecoTEC
43
8 Troubleshooting
Display Meaning
d.78
Display value/adjustable value
Storage charging temperature limit (target flow temperature in storage mode, system boilers only)
Heating operating hours
Adjustment range in °C 55 to 90 (Factory setting: 80)
in h1)
d.93
Water heating operating hours (combination boilers
only)
Cycles in heating mode
Cycles in hot water operation
Maintenance indicator: Number of hours until the next
maintenance
DSN appliance variant setting
Quantity/1001) (3 corresponds 300)
Quantity/1001) (3 corresponds 300)
Adjustment range: 0 to 3000 h and “-” for disabled
Factory setting: “-” (300 corresponds to 3000 h)
Adjustment range: 0 to 99
d.96
Factory setting
1 = Resetting adjustable parameters to factory setting
d.80
d.81
d.82
d.83
d.84
in h1)
1) Five-digit numbers are saved with the diagnostics codes 80 to 83. If d.80, for example, is selected, only the first two digits of the
number are displayed (e. g. 10). The display switches to the last three digits (e. g. 947) by pressing “i”. In this example the number of
operating hours of the heating is 10947 h. The display returns to the selected diagnostics item by pressing “i” again.
Table 8.3 Diagnostics codes of the second diagnostic level
(continued)
8.1.3 Fault codes
Fault codes take priority over all other display functions
in the event of a system fault occurring.
If multiple faults occur, the corresponding fault codes
are displayed alternately for about two seconds each.
8.1.4 Fault memory
The fault memory stores details of the ten most recent
faults.
• Press the ”i” and ”–” buttons simultaneously.
• Use the ”+” button to scroll back through the list of
memorised errors.
To cancel fault error memory display mode, proceed as
follows:
• Press the ”i” button below the display or
• Do not touch any key for about four minutes. The display will now revert back to showing the current flow
temperature.
Code
Meaning
Cause
F. 0
Flow–NTC open circuit
F. 1
Return–NTC open circuit
NTC broken, NTC cable broken, Defective connection at NTC,
Defective connection at electronics
NTC broken, NTC cable broken, Defective connection at NTC,
Defective connection at electronics
NTC defective, short circuit in cable harness, cable/casing shortcut
F.10
Flow NTC short circuit
F.11
Return NTC short circuit
NTC defective, short circuit in cable harness, cable/casing shortcut
F.13
Tank NTC short circuit
NTC defective, short circuit in cable harness, cable/casing shortcut
F.20
Safety temperature limiter by NTC activated
Flow-NTC not correctly thermal-connected or defective; appliance
does not shut down
F.22
Dry fire
F.23
Water shortage, temperature difference between flow
and return NTC too large
Water shortage, temperature rise too quick
Too little water in the appliance, water pressure sensor defective,
cable to pump or water sensor defective, pump blocked or defective, pump output too low
Pump blocked or defective, pump output too low, flow and return
NTC interchanged
Pump blocked, insufficient pump output, air in appliance, water
pressure too low
F.24
Table 8.4 Error codes
44
Instructions for installation and servicing ecoTEC
Troubleshooting 8
Code
Meaning
Cause
F.25
Interruption in the compact thermal module cable harness
Incorrect sensing of flame
Compact thermal module cable harness defective
F.27
F.28
Flame detector defective
F.62
Appliance does not start: Attempts to ignite during start Faults in the gas supply such as:
failed
- Gas meter or gas pressure detector defective
- Air in gas
- Gas flow pressure too low
- Fire protection tap has disengaged
Faults in the gas valve, wrong gas setting, igniter (ignition transformer, ignition cable, ignition plug) defective, ionisation current
stopped (cable, electrode), faulty earthing in appliance, electronics
defective
Flame goes off during operation and subsequent ignition Gas supply temporarily stopped, faulty earthing of appliance
attempts failed
Fan speed variation
Fan blocked, plug not inserted correctly on fan, hall sensor defective, fault in cable harness, electronics defective
eBUS undervoltage
Short circuit on eBUS, overload on eBUS or two power sources on
eBUS with different polarity
Gas–valve control defective
Short circuit/earth (ground) leak in cable harness to gas valves, gas
valve assembly defective (earth/ground leak from coils), electronic
control system defective
Gas valve shutoff delay
Gas valve leaking, electronics defective
F.63
EEPROM error
Electronics defective
F.64
Electronics/NTC fault
Short-circuit in flow or return NTC or electronics defective
F.65
Electronics temperature too high
Electronics too hot due to external effect, electronics defective
F.67
Electronics defective
F.70
Flame detector input signal is outside the limits
(0 or 5 V)
No valid DSN in display and/or mainboard
F.71
Flow NTC reports constant value (stuck at)
Spare part failure display and maiboard interchanged at same time
and device specific number not adjusted
Flow NTC is defective
F.72
Flow and/or return NTC fault
Flow and/or return NTC is defective (tolerances too big)
F.73
Water pressure sensor signal out of range (too low)
F.29
F.32
F.49
F.61
F.74
F.75
F.76
F.77
F.78
con
Cable to water pressure sensor is broken or has a short-circuit at
0 V or water pressure sensor defective
Water pressure sensor signal out of range (too high)
Cable to water pressure sensor has a short-circuit at 5 V / 24 V or
internal fault in water pressure sensor
No pressure rise was detected on turning on the pump
Water pressure sensor or/and pump defective
Air in the heating system, quick bleeder defective
Too little water in appliance; check adjustable by-pass; connect
external expension vessel to return
Overheating protection on primary heat exchanger trig- Cable or cable connection of fuse in the primary heat exchanger
gered
defective, or primary heat exchanger defective
condensate pump or feedback of accessorie blocks heat- condensate pump defective or flume flap feedback triggered
ing
wrong configuration with accessory
link box VR65 connected to combination boiler
no communication to mainboard
connection error display mainboard
Table 8.4 Error codes (continued)
Instructions for installation and servicing ecoTEC
45
8 Troubleshooting
9 Parts replacement
8.4 Test programs
Special functions can be triggered on the appliances by
activating various test programs.
These programs are given in detail in the
Table 8.5.
• The test programs P.0 to P.6 will be started when
“Power ON” is turned on and the “+” key is pressed
for 5 s. The display shows “P.0”.
• Press the “+” key to start counting the test number
upwards.
• Press the “i” to operate the appliance now and to start
the test program.
• Press “i” and “+” simultaneously to exit the test programs. You can also exit the test programs by not
pressing any key for 15 minutes.
9
Parts replacement
The tasks listed below in this section may be carried out
only by a qualified engineer.
• Only use genuine spare parts for repairs.
• Make sure the parts are correctly fitted and that their
original position and alignment are retained.
9.1
Safety instructions
Danger!
Each time the components are replaced, comply
with the safety instructions below for your own
safety and to avoid damage to the appliance!
• Put the appliance out of operation.
Display
P.0
P.1
P.2
P.3
P.4
P.5
P.6
Meaning
Important:
Before starting any maintenance work:
Isolate the mains electricity supply by disconnecting the plug at the socket outlet (if there is
only an isolating switch remove the fuse from
the switch).
Bleeding test program. The heating circuit and hot
water circuit (combination boiler only) is bled via the
automatic air vent (the cap on the automatic air vent
must be loosened).
Test program where the appliance is operated in full
load after successful ignition
Test program where the appliance is operated with
minimum gas volume (ignition gas volume) after successful ignition
not available
not available
Test program for the safety temperature limit check;
appliance heats up by by-passing a regulating shutdown through the flow regulator until the shutoff temperature of 97 °C is achieved.
Filling test program. The diverter valve moves to the
centre position
Table 8.5 Test programs
8.5 Resetting parameter to factory settings
Besides the option to reset individual parameters manually to the factory settings specified in tables 8.2 and
8.3, you can also reset all parameters simultaneously.
• In the second diagnostic level, under the diagnostic
number “d.96” change the value to 1 (see section
8.1.2).
The parameters of all adjustable diagnostic numbers
now correspond to the factory settings.
• Close the service valve in the gas supply as well as the
service valves in the heating flow and return pipe.
• Close the service valve in the cold water supply line
(combination boilers only)!
• Empty the appliance if you want to replace water-bearing components of the appliance!
• Make sure that no water drops on live components
(e.g. switch box etc.)!
• Use only new seals and O-rings!
• After completing the work, check for gas leaks and
perform a function check (see section 7.6)!
• Always check earth continuity, polarity and resistance
to earth with a multimeter after any service work and
after exchanging any electrical component.
9.2
Replacing burner
Danger!
Before replacing the component, comply with
the safety instructions in Section 9.1.
• Dismantle the burner module as described in Section
7.2.1.
46
Instructions for installation and servicing ecoTEC
Parts replacement 9
5
1
Fig. 9.1 Replacing burner
Fig. 9.3 Gas fitting/fan screwed joint
• Loosen the 4 screws (1) on burner, and remove the
burner.
• Mount the new burner with a new seal. Ensuring that
the notch in the burner aligns with the burner viewing
window.
• Install the burner module as described in Section 7.2.4.
• After completing the work, check for gas leaks and
perform a function check (see section 7.6)!
9.3
Caution!
Mount the gas valve and the fan in the same
position as before.
• Screw on the fan with the gas valve. Please use new
seals.
• Install the complete “gas valve/fan” unit in reverse
sequence.
• After completing the work, check for gas leaks and
perform a function check (see section 7.6)!
Replacing fan or gas valve
Danger!
Before replacing the component, comply with
the safety instructions in section 9.1.
•
•
•
•
• Remove both fixing screws (5) on the gas valve and
remove the fan from the gas valve.
• Replace the defective component.
Turn off the boiler.
Isolate the electrical supply to the boiler
Remove the air intake pipe (Fig. 7.1, Pos. 2).
Loosen the gas supply pipe on the gas fitting (Fig. 7.2,
Pos. 3).
9.4
Replacing expansion vessel
Danger!
Before replacing the component, comply with
the safety instructions in Section 9.1.
• Disconnect the appliance from the mains as described
in Section 9.1, and close the service valve in the gas
supply pipe.
• Close the flow and return service valves and drain the
water from the boiler.
1
2
4
3
Fig. 9.2 Dismantling fan with gas fitting
• Pull out the plug (4) from the gas valve.
• Pull out the plug (3) from the fan.
• Remove the three screws (2) on the burner module
(1).
• Remove the complete “gas valve/fan” unit.
Instructions for installation and servicing ecoTEC
47
9 Parts replacement
9.5
Replacing primary heat exchanger
Danger!
Before replacing the component, comply with
the safety instructions in Section 9.1.
1
2
• Disconnect the appliance from the mains as described
in Section 9.1, and close the service valve in the gas
supply pipe.
• Close the flow and return service valves and drain the
appliance.
• Remove the burner module as described under 7.2.1.
• Remove the expansion vessel as described under 9.4.
• Pull out the condensate pipe to the siphon from the
primary heat exchanger.
3
3
1
2
4
Fig. 9.4 Replacing expansion vessel
• Undo the nut (4) on the water pipe on the lower side
of the expansion vessel.
• Remove both screws (1) retaining plate (2) and remove
the retaining plate.
• Pull out the expansion vessel (3) forwards.
• Guide the new expansion vessel back into the appliance.
• Re-connect the new expansion vessel using a new seal.
• Refix the retaining plate.
• Check the pressure of the expansion vessel (minimum
pressure 0.75 bar).
If necessary, adjust the pressure to the static height of
the heating system.
• Fill and vent the boiler.
• After completing the work, check for water leaks and
perform a function check (see section 7.6)!
48
4
Fig. 9.5 Replacing primary heat exchanger
• Pull out the clamps (1) and (2) and free the return pipe
as well as the flow pipe on the primary heat exchanger.
• Remove the four screws (3) on the primary heat
exchanger holder.
Instructions for installation and servicing ecoTEC
Parts replacement 9
9.6
Replacing electronics and display
Danger!
Before replacing the component, comply with
the safety instructions in Section 9.1.
1
2
3
Fig. 9.6 Primary heat exchanger holder
• Disconnect the plug-in connection (2) of the thermal
fuse in the primary heat exchanger.
• Remove the three screws (3) on the primary heat
exchanger holder.
• Turn the holder to the side around the rivet (1), pull
the primary heat exchanger downwards to the right
and remove it from the appliance.
• Mount the new primary heat exchanger in reverse
order and replace the seals.
Caution!
Risk of damaging the primary heat exchanger!
Neither loosen nor retighten the four screws
(Fig. 9.5, Pos. 4).
Caution!
Insert the seal rings for the flow and return
pipe on the primary heat exchanger with a suitable lubricant.
Insert the flow and return connection in the primary heat exchanger as far as they will go and
make sure the clamps are fitted correctly on
the flow and return pipe (see fig. 9.5).
• Fill and vent the boiler as required.
• After completing the work, check for gas and water
leaks and perform a function check (see section 7.6)!
• Comply with the assembly and installation manuals
provided with the spare parts.
Replacing display or electronics
If you are replacing only one of the two components, the
parameter adjustment functions automatically. On turning on the appliance, the new component takes over the
previously set parameters from the components that are
not replaced.
Replacing display and electronics
When replacing both components, after being turned on,
the appliance goes to fault and displays the error message “F70”.
• In the second diagnostic level, under the diagnostic
number “d.93” enter the number of appliance variant
according to Table 9.1 (see section 8.1.2).
The electronics is now set to the appliance type and the
parameters of all adjustable diagnostics numbers correspond to the factory settings.
Appliance
ecoTEC plus 612
ecoTEC plus 615
ecoTEC plus 618
ecoTEC plus 624
ecoTEC plus 630
ecoTEC plus 637
ecoTEC plus 824
ecoTEC plus 831
ecoTEC plus 837
ecoTEC pro 28
Device specific number
0
1
2
3
4
5
6
7
8
0
Table 9.1 Device specific numbers
9.7
Check CO2 content and if necessary set (airratio adjustment)
Note
Checking/adjustment of this value is required in
the following instances: replacement of gas
valve, conversion to or from Natural Gas/LPG
or if incorrect combustion is suspected!
• Remove the front cover.
• Press the “+” and “-” keys simultaneously.
The “Full load mode” is activated.
• Wait at least 5 minutes until the appliance reaches its
operating temperature.
Instructions for installation and servicing ecoTEC
49
9 Parts replacement
10 Recycling and disposal
11 Vaillant service
Settings
1
Natural gas (H) Propane
Tolerance
Tolerance
CO2 after 5 min. full load
mode with appliance front
closed
CO2 after 5 min. full load
mode with appliance front
removed
Set for Wobbe-Index W0
CO value with full load
Unit
9.2 ± 1,0
10.2 ± 0,5 Vol.–%
9.0 ± 1,0
10.0 ± 0,5 Vol.–%
15
< 250
22.5
< 250
kWh/m3
ppm
Table 9.2 Factory gas settings
2
10 Recycling and disposal
The design of all Vaillant products takes into account the
subsequent recycling and/or eventual safe scrapping of
each component used. Vaillant’s in–house rules set strict
standards in this respect. The selection process used for
choosing raw materials includes full consideration of
their recycling characteristics, and of the breakdown and
separation properties of subassemblies. We also take
fully into account the environmental and health hazards
involved in recycling and in the disposal of non–reusable
waste items.
Fig. 9.7 Carrying out measurement of CO2 levels, preparing for
air-ratio adjustment
• Measure the CO2 content on the flue gas measuring
nozzles (1).
• If necessary, loosen the screw and fold the suction
pipe extension forwards by 90° (don‘t remove!).
• If necessary, set the corresponding flue gas value
(value with removed appliance front, see table 9.2) by
turning the screw (2).
-> Turn to the left: higher CO2 content,
-> Turn to the right: lower CO2 content,
Note
Only for natural gas:
Adjust only in increments of 1/8 turn and wait
approx. 1 minute after each adjustment until
the value stabilises.
Only for liquid gas:
Adjust only in very small increments (approx.
1/16 turn), and wait approx. 1 minute after each
adjustment until the value stabilises.
•
•
•
•
Fold back the suction pipe extension upwards.
Check the CO2 content again.
If necessary, repeat setting.
Press the “+” and “-” keys simultaneously.
The “Full load mode” is turned off. The full load mode
is also turned of if no key is pressed for 15 minutes.
• Fasten the suction pipe extension.
• Attach the front cover again.
50
10.1 Appliance
The Vaillant ecoTEC consists largely (92 %) of metal
components designed for eventual recycling by incorporation into the smelting process of a steelworks. This
gives these parts virtually unlimited scope for subsequent re–use. All plastic materials are duly identified to
facilitate sorting and separation when the time comes to
recycle the unit.
10.2 Packaging
Vaillant endeavours to keep the amount of transport
packaging used for its equipment to the bare minimum
necessary. Subsequent re–use is taken into account
when selecting packaging materials. High–quality cardboard has long been a valuable secondary raw material
for the card and paper industry. The sections of EPS
(Styropor®) are required in order to protect equipment
in transit. EPS is 100 % recyclable and CFC–free. The
foil–wrapping and securing straps are likewise made of
recyclable plastic.
11
Vaillant service
To ensure regular servicing, it is strongly recommended
that arrangements are made for a Maintenance
Agreement. Please contact Vaillant Service Solutions
(0870 6060 777) for further details.
Instructions for installation and servicing ecoTEC
Appendix
Appendix
Instructions for installation and servicing ecoTEC
51
839592_03 GB 03 2006